when exposed to an etchant, the atoms at the grain boundary dissolve at a greater rate than those within grains. this is because the atoms at the boundary : Have a higher state of energy
Etchant is an acid or corrosive that is used to etch. Etching is traditionally the process of cutting into the unprotected parts of a metal surface with a strong acid or mordant to create an intaglio design in the metal.
A grain boundary in materials science is the interface between two grains, or crystallites, in a polycrystalline material. Grain boundaries are 2D defects in the crystal structure that tend to reduce the material's electrical and thermal conductivity.
Most grain boundaries are preferred sites for the initiation of corrosion and the precipitation of new phases from the solid. Grain boundaries, on the other hand, disturb the movement of dislocations through a material, so limiting crystallite size is a pervasive way to improve a material's strength.
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Firework Spectacular - Newton’s Law
Use your knowledge of Newton’s Laws to complete the calculations.
Newton’s Law .Use your knowledge of Newton’s Laws to complete the calculations. 1) F = 0.98 N 2) F = 3.9 N 3) F = 6.86 N 4) F = 10.78 N 5) F = 24.5 N 6) F = 49 N 7) F = 80.36 N.
Newton's law : F = ma
where, F = force
m = mass
a = acceleration due to gravity = 9.8 m/s²
1) mass = 0.10 kg ,
F = ma
F = 0.10 kg × 9.8 m/s²
F = 0.98 N
2) mass = 0.40 kg
F = ma
F = 0.40 kg × 9.8 m/s²
F = 3.9 N
3) mass = 0.70 kg
F = ma
F = 0.70 kg × 9.8 m/s²
F = 6.86 N
4) mass = 1.1 kg
F = ma
F = 1.1 kg × 9.8 m/s²
F = 10.78 N
5) mass = 2.5 kg
F = ma
F = 2.5 kg × 9.8 m/s²
F = 24.5 N
6) mass = 5.0 kg
F = ma
F = 5.0 kg × 9.8 m/s²
F = 49 N
7) mass = 8.2 kg
F = ma
F = 8.2 kg × 9.8 m/s²
F = 80.36 N
Thus, Newton’s Law .Use your knowledge of Newton’s Laws to complete the calculations. 1) F = 0.98 N 2) F = 3.9 N 3) F = 6.86 N 4) F = 10.78 N 5) F = 24.5 N 6) F = 49 N 7) F = 80.36 N.
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Because Earth’s axis is ____________________, the hemispheres receive different amounts of solar energy at different times.
Answer:
Pretty sure its Tilted
Explanation:
Answer: Tilted
Explanation:
What type of radiation is emitted when an electron in a hydrogen atom drops from energy level 6 to 2?.
When the electron falls from energy level 6 to energy level 2, it will irradiate Balmer series that lies in the visible region of electromagnetic spectrum.
A hydrogen atom has six spectral lines. Spectral emissions occurs when an electron transitions jumps from a higher energy state to a lower energy state. The spectral lines are grouped into series according to the lower energy level of atomic hydrogen is divided into a number of spectral series, with wavelengths.
Wavelength of these spectral lines can be calculated by the Rydberg formula and these spectral lines are formed due to the electron that undergoes transitions between two energy levels in an atom.
Spectral emissions occurs when an electron transitions jumps from a higher energy level to a lower energy level.
The spectral lines are generally grouped into series according to the lower energy level.
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solar and wind power are ____ and safe forms that are renewable and don't pollute
what is the most important reason why ordering the elements by increasing atomic mass does not result in an effective periodic tabe
The most important reason why ordering the elements by increasing atomic mass does not result in an effective periodic table is that the atomic mass does not increase in a regular manner in going from one element to next.
What is a Atomic mass ?An atom's mass is its atomic mass. Although the kilogram is the SI measure of mass, the unified atomic mass unit, or dalton, is a common way to express atomic mass. An unbound carbon-12 atom in its ground state has a mass of 112 of a Da.
14.0067 u is the atomic mass of nitrogen.
Hence, the most important reason why ordering the elements by increasing atomic mass does not result in an effective periodic table is that the atomic mass does not increase in a regular manner in going from one element to next.
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can oxidation reaction be useful in terms of energy
Answer:Oxidation-reduction (redox) reactions are important because they are the principal sources of energy on this planet, both natural or biological and artificial. Oxidation of molecules by removal of hydrogen or combination with oxygen normally liberates large quantities of energy.
thu: yes
(LAB 9: SPECTROSCOPY: ABSORPTION & EMISSION)What is the difference between absorption and emission? Transmission and reflection?
Answer:
• Absorption changes the state of a particle from its original state to a higher state.
• Emission makes a particle go from a high energy state to a lower one.
,• In the Transmission the wave passes from one medium to another.
,• In the Reflection the wave changes direction when it collides with a different medium.
Explanation:
- Difference between absorption and emission:
Absorption and emission are related to electromagnetic radiation. The difference is that the Absorption of electromagnetic radiation changes the state of a particle (for example, an atom), from its original state to a higher state. While the Emission of electromagnetic radiation makes a particle with high energy content go from a high energy state to a lower one, in this case, the particle releases energy in the form of a photon.
- Difference between transmission and reflection:
Transmission and reflection are ways in which a wave moves. The difference is that in the Transmission the wave passes from one medium to another and in the Reflection the wave changes direction when it collides with a different medium.
How do the four properties of liquids relate to the polarity of a molecule?Include the following terms in your answer: bonds, polar, non-polar, adhesion, cohesion,surface tension, capillary rise. This summary should be several sentences long. Needs to be a short summary including those words. Please HELP!
Answer
In summary
A number of properties of liquids, such as cohesion and adhesion, are influenced by the intermolecular forces within the liquid itself. Cohesion are various intermolecular forces that hold solids and liquids together while adhesion is the ability of a liquids to stick to an unlike substance. The rise or fall of a liquid in a capillary tube is governed by the balance of cohesive and adhesive forces. Lastly, surface tension is a fundamental property of the surface of liquid, it is responsible for the curvature of the surfaces of liquids dues to the polarity that exists in the liquid molecules.
Explanation
Liquids flow because the intermolecular forces between molecules are weak enough to allow the molecules to move around relative to one another. The forces are attractive when a negative charge interacts with a nearby positive charge and repulsive when the neighboring charges are the same, either both positive or both negative. Molecules are held together by polar covalent bonds – which means that the electrons are not evenly distributed between the bonded atoms. This uneven distribution in the covalent bonds of the molecules results in a partial charge.
The liquid molecules don’t interact particularly strongly with each other because the intermolecular forces are weak. The primary intermolecular forces – are London dispersion forces, which for small molecules are the weakest types of intermolecular forces. These weak forces lead to low cohesion. The molecules don’t interact strongly with each other, so they can slide right past one another.
Adhesion is the tendency of a compound to interact with another compound. (Remember that, in contrast, cohesion is the tendency of a compound to interact with itself.) Adhesion helps explain how liquids interact with their containers and with other liquids. One example of an interaction with high adhesion is that between water and glass. Both water and glass are held together by polar bonds. Therefore, the two materials can also form favorable polar interactions with each other, leading to high adhesion.
does a reaction occur when aqueous solutions of nickel(ii) nitrate and sodium chloride are combined? yesno if a reaction does occur, write the net ionic equation. use the solubility rules provided in the owl preparation page to determine the solubility of compounds. be sure to specify states such as (aq) or (s). if a box is not needed leave it blank. Does reaction occur when aqueous solutions of potasium hydroxide and copper(II) chloride are combined?
When Nickle chloride reacts with lead nitrate then lead chloride precipitate formed NiCl2(aq) + Pb(NO3)2(aq) → Ni(NO3)2(aq) + PbCl2(s).
Solubility is the capacity of a substance, the solute, to shape a solution with any other substance, the solvent. Insolubility is the opposite property, the incapability of the solute to shape the sort of solution.
Solubility is defined because the most quantity of a substance in an effort to dissolve in a given amount of solvent at a unique temperature. Solubility is a characteristic property of a particular solute–solvent combination, and unique substances have significantly differing solubilities.
The reaction is between sodium sulfide and zinc sulfate formed precipitate of zinc sulphide
ZnSO4 (aq) +NaS(aq) - - - - > Na2SO4 (aq) +ZnS(s)
When silver sulphate reacts with lead nitrate then lead dulphate precipitate formed.
Ag2SO4(aq) + Pb(NO3)2(aq) → PbSO4(s) + 2AgNO3(aq)
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What is the difference between pcr and sanger sequencing with regard to the materials needed to perform these reactions?.
Sanger sequencing requires dideoxynucleotides, although PCR does not.
What is DNA sequencing?
A DNA molecule's exact nucleotide or base sequence can be found using a general laboratory procedure known as DNA sequencing. The bases' order encodes the biological information that cells utilize to grow and function (commonly referred to by the initial letters of their chemical names: A, T, C, and G).
Polymerase chain reaction (abbreviated PCR) is a laboratory technique for rapidly producing (amplifying) millions to billions of copies of a specific segment of DNA, which can then be studied in greater detail. PCR involves using short synthetic DNA fragments called primers to select a segment of the genome to be amplified, and then multiple rounds of DNA synthesis to amplify that segment.Sanger sequencing is a technique for DNA analysis that uses electrophoresis and is based on DNA polymerase's haphazard incorporation of chain-terminating dideoxynucleotides during in vitro DNA replication. It was the most extensively used sequencing technique for over 40 years after Frederick Sanger and colleagues initially developed it in 1977. In 1986, Applied Biosystems launched the first commercialization of it. For large-scale, automated genome analysis, next-generation sequencing techniques have lately displaced greater volume Sanger sequencing. For smaller-scale initiatives and the verification of deep sequencing results, the Sanger method is still widely used.Hence, Sanger sequencing requires dideoxynucleotides, although PCR does not.
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Rank the following from MOST soluble in water to LEAST soluble in water.
a) CH3CH2CH2OH
b) HOCH2CH2OH
c) CH3CH2CH2CH3
Propanol, ethylene glycol, then butane this is the solubility in water of these molecules. Ethylene glycol is miscible in water. Solubility of butane is 61 mg/l. And propanol is totally soluble in water.
What is solubility ?The capacity of a material, the solute, to combine with another substance, the solvent, is known as solubility. Insolubility, or the solute's inability to create such a solution, is the opposite attribute.
Hydrogen bonds as well as dipole-dipole forces can be used by 1-propanol to interact with water. By neither method can butane interact with water. Therefore, 1-propanol has a substantially higher solubility.
The most soluble form of ethylene glycol is water. because it may create a H bond with water because to its two -OH groups. Therefore, more H bonding increases solubility in water.
Thus, most soluble in water to least soluble in water is option A, option B and then option C.
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What happens when the seafloor spreads?
(A) Old crust moves closer together.
(B) New crust forms near the continental slope.
(C) New crust moves away from the mid-ocean rift.
(D) Basalt cools to form a new crust near the mid-ocean rift.
hurry im on a TEST!!!!
When the seafloor spreads Basalt cools to form a new crust near the mid ocean rift.
Seafloor spreads means the separation of seafloor. Tectonic plate and the large plate of the lithosphere will split apart from the each other. This process occurs at the mid ocean ridges and . seafloor spreading leads to dangerous things like rising sea level and earthquake . the cause for the seafloor spreading is ocean floors ruggedness. hot magma cooled to form igneous rock. this Basalt (the rock ) cools to form a new crust near the mid ocean rift.
Thus, When the seafloor spreads Basalt cools to form a new crust near the mid ocean rift.
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An acid and base will combine to form a new substance with new properties in a??
Salt.
Acids and bases, when brought together, form salt and water through a process known as neutralization process. Since NaCl, the salt, is of majority use in the body, the answer to this question is salt.
equimolar samples of n2 and o2 are both at standard conditions (1 atm, 273k). a) which sample has more kinetic energy? why?
The gas that has more kinetic energy is nitrogen.
Which sample has a greater kinetic energy?We know that from the ideal gas equation, the molecules that compose a gas are in constant random motion. The implication of this is that, the kinetic energy of the molecules of the gas would depend on the velocity of the molecules of the gas.
Since we can not measure the individual velocities of the molecules of a gas but we can be able to measure the root mean square speed of the molecules of the gas as we can see.
This root mean square velocity is going to depend on the molar mass of the gas as well as the temperature of the system. Where the system is at the same temperature, the greater the molar mass, the lesser the kinetic energy of the gas.
Nitrogen ([tex]N_{2}[/tex]) has a molar mass of 28 g/mol while oxygen ([tex]O_{2}[/tex]) has a molar mass of 32 g/mol.
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how many grams of cacl2 are needed to make 785.7 g of a solution that is 31.5 % (m/m) cacl2 in water? note that mass is not technically the same thing as weight, but % (m/m) has the same meaning as % (w/w).
The amount of calcium chloride in the supplied solution weighs 247.49 g is needed to make 785.7 g of a solution that is 31.5% cacl2 in water.
We receive:
Solution mass: 785.7 grams
Water contains 31.5% (m/m) calcium chloride as well.
This indicates that there are 31.5 g of calcium chloride in a 100 g solution.
We employ the unitary technique to determine the mass of calcium chloride in the specified volume of solution:
The mass of calcium chloride present in 100 g of solution is 31.5 g.
Therefore, in 785.7 g of solution, there are 785.7 g of calcium chloride.
31.5/100*785.7
= 247.49 g
Consequently,247.49 g of calcium chloride are present in the given amount of solution.
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a 20.0 ml solution of naoh is neutralized with 24.2 ml of 0.200 m hbr. what is the concentration of the original naoh solution?
Answer:The concentration of the original NAOH solution is 0.242 M.
Explanation:
We know that for neutralization reaction the no. of mole of H+ ions from the acid must be equal to that of those of OH- ions released from base.
Since both HBR and NAOH are monobasic and monoacidic respectively we can use the formula
No. of milimoles of H+ = No. of milimoles of OH- ( Note – as both the volumes are given in ml so take milimoles)
Or; MV(HBR)=MV(NAOH)
24.2x0.2=20xM(NAOH)
Or; Molarity =0.242M.
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Write 1 fact about Alkali Metals.
Answer: they are shiny metals with low melting points
Look around the room and find something. What are its
properties?
Look around the room and find something properties are size shape and texture
Object around us are all kind of object and thus identifying them is important and all these differ from one another by some properties and every object we use is made to fulfil some purpose for us and object have properties that can observed and described are size and shape and texture and every object posses a different kind of texture and object of the same shape are classified into one group and object having the same shape are therefore classified into one object cluster
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. In the reaction H₂ + I₂ --> 2HI, the iodine undergoes ______________________ (1 pt)
*
1 point
oxidation
reduction
no change in oxidation number
In the reaction H₂ + I₂ --> 2HI, the iodine undergoes reduction.
The balanced reaction as:
H₂ + I₂ --> 2HI
The oxidation state of hydrogen is increases from 0 to + 1
The oxidation state of iodine is decreases from 0 to -1
The increase in oxidation number is called oxidation. The decrease in oxidation number is called as reduction . the loss of electrons is called as oxidation and the gain of electron is called as reduction
oxidation = hydrogen , reducing agent = hydrogen
reduction = oxygen , oxidizing agent = oxygen
Thus, In the reaction H₂ + I₂ --> 2HI, the iodine undergoes reduction.
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how to predict melting points
The melting point of a substance can be predicted by comparing the relative strength of their intermolecular forces.
What is Melting point?This is referred to as the temperature in which a substance changes state from solid to liquid and an example is the temperature in which ice turns to liquid water. Temperature on the other hand is the degree of hotness or coldness of a substance or body.
Intermolecular forces are the forces which mediates interaction between molecules and studies has shown that the stronger the intermolecular bonds the greater the melting temperature of the substance and vice versa thereby making ways to predict it.
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Wavelength of yellow light with frequency of 5.2x10 14
Answer:
5.77x10^-7 m or 577 nm (nanometers)
Explanation:
The wavelength, λ, and frequency, ν, of light are described by the equation:
c = λν
where c is the speed of light.
c = 3.0x10^8 m/s
v = 5.2x10^14
λ = c/v
λ = (3.0x10^8 m/s)/(5.2x10^14) = 5.77x10^-7 m
since 1 m = 10^9nm, we can express this as 577 nm (nanometers)
577 nm. This is in the yellow light span of wavelengths.
A solution has a concentration of 0. 6 mol/dm3. If a container of this solution holds 3 moles of solute, what volume of solution is in the container?.
The volume of the solution is 50 dm3. We can use the below formula:
Concentration = [tex]\frac{moles}{volume}[/tex]
But, if we shift the positions of concentration and volume, then:
volume = [tex]\frac{moles}{concentration}[/tex]
Now, just by substituting the corresponding values, we can obtain the volume of solution in the container.
Volume = [tex]\frac{3 moles}{0.06 moles / dm3}[/tex] = 50 dm3.
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Objective: Quantify titration equivalence points. Apply the concepts of mole and stoichiometry.
Represent solutes and reactions in aqueous solutions.
Question: In our Analysis of Antacid lab, we started with a known concentration and volume of
hydrochloric acid that was partially neutralized by the active ingredient of an antacid tablet according to
the following equation:
2 HCI (aq) + CaCO, (s)→ CaCl₂ (aq) + CO₂ (g) + H₂O (1)
The remaining acid was then titrated with a known concentration of NaOH.
Use this student's lab data to calculate the moles of acid neutralized by the antacid tablet and the
mass of the active ingredient required:
Concentration of HCI
Volume of HCI added
Mass of antacid tablet.
Concentration of NaOH
Volume of NaOH
1.0755 M
25.00 mL
1.503 g
1.0031 M
16.80 mL
Include definitions, explanations, discussion of your problem-solving process.
The number of moles of moles of acid neutralized by the antacid tablet and the mass of the active ingredient required are,0.252055 moles and 25.2 g respectively.
First, we need to calculate the moles of HCI that were added. This is simple to do, we just need to use the formula
moles=MxV
where M is the molarity (concentration) of the acid and V is the volume in liters. Since we have the concentration in molarity and the volume in mL, we need to convert the volume to liters. We can do this by dividing the volume in mL by 1000. This gives us the following equation:
moles=Mx(V/1000)
Plugging in our values, we get
moles=(1.0755)x(25.00/1000)
moles=0.26889
Now that we know the moles of HCI that were added, we can calculate the moles of acid that were neutralized by the antacid tablet. To do this, we need to use the balanced chemical equation for the reaction.
2HCI (aq) + CaCO₃ (s)→ CaCl₂ (aq) + CO₂ (g) + H₂O (l)
We can see from the equation that for every mole of HCI that is neutralized, one mole of CaCO₃ is used up. This means that the number of moles of HCI that were neutralized is equal to the number of moles of CaCO₃ that were used up.
Since we know the number of moles of HCI that were added (from the previous calculation), we can just subtract this from the number of moles of HCI that were left after the reaction (which is equal to the number of moles of NaOH that were used in the titration).
To calculate the number of moles of NaOH that were used, we just need to use the formula
moles=MxV
where M is the molarity (concentration) of the NaOH and V is the volume in liters. Since we have the concentration in molarity and the volume in mL, we need to convert the volume to liters. We can do this by dividing the volume in mL by 1000. This gives us the following equation: moles=Mx(V/1000)
Plugging in our values, we get
moles=(1.0031)x(16.80/1000)
moles=0.0168352
Now that we know the number of moles of HCI that were added and the number of moles of NaOH that were used, we can calculate the number of moles of HCI that were neutralized by the antacid tablet.
We do this by subtracting the number of moles of NaOH from the number of moles of HCI. This gives us the following equation:
moles of HCI neutralized= moles HCI added− moles NaOH used
Plugging in our values, we get
moles HCI neutralized= (0.26889)−(0.0168352)
moles HCI neutralized= 0.252055
This means that the antacid tablet neutralized 0.252055 moles of HCI.
Now that we know the number of moles of HCI that were neutralized, we can calculate the mass of the active ingredient required.
To do this, we need to use the balanced chemical equation for the reaction.
2 HCI (aq) + CaCO₃, (s)→ CaCl₂ (aq) + CO₂ (g) + H₂O (l)
We can see from the equation that for every mole of HCI that is neutralized, one mole of CaCO₂ is used up.
This means that the mass of the active ingredient required is equal to the number of moles of HCI that were neutralized multiplied by the molar mass of CaCO₃.
The molar mass of CaCO₃ is 100.09 g/mol. This gives us the following equation:
mass = moles x molar mass
where mass is the mass of the active ingredient required, moles is the number of moles of HCI that were neutralized, and molar mass is the molar mass of CaCO₃. Plugging in our values, we get
mass=(0.252055)x(100.09)
mass=25.2 g
This means that the active ingredient in the antacid tablet must have a mass of at least 25.2 g in order to completely neutralize the acid.
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What happened to the pressure as we traveled down?
What rocks make up most of the Earth’s crust?
Oceanic-______________________________________________________
Continental-__________________________________________________
Why do you think the ocean crust contains rocks that are denser than the rocks found on land?
What makes up the lithosphere?
The plates of the lithosphere move slowly because they float on top of the asthenosphere. Describe how the molten material in the mantle causes this movement of the lithospheric plates.
As we move to the interior of the Earth the pressure rises steadily.
The pressure increases deeper into the Earth's interior, from the lithosphere, the mantle, and the inner and outer core.
The high pressure present in the interior also affects the composition of the inner core which is solid.
The oceanic crust is made of Basaltic rocks, making the oceanic crust a bit denser than the continental crust.
The continental crust is considerably thicker in comparison to the oceanic crust. Still, it is made up mostly of various types of granite, which causes it to be a bit lighter than the oceanic crust.
Another reason for this disparity is the difference in the composition of magma that creates the continental and oceanic crust. The magma responsible for the creation of oceanic crust is richer in Mg and Ca while it lacks Al and Si, continental crust on the other hand is composed of magma which has higher concentrations of Al and Si.
The lithosphere extends from the topmost rocky exterior of the Earth's surface to the top part of the upper mantle.
The tectonic plates of the Lithosphere move at a very very slow pace so much so that they move about a few centimeters in a year. The reason behind this is that these are very heavy solid plates, solids have high viscosity and thus they are very hard to move. Along with this the plates also face resistance from the upper mantle.
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what is the molarity of a solution prepared from 34.5 grams of nacl in 250.0 milliliters of solution?
The molarity of the given solution will be 2.356 moles/ litre
We knw that molarity can be calculated using the formula,
Molarity= No of moles of solutes / Volume of solution in Litres
Molarity= (mass/molar mass)/ Volume of solution in Litres
We divide the number of moles of solute by the total volume of liters of solution to determine the molarity of a solution.
When the solute's volume is specified in grams, we must first determine how many moles there are of the solute.
By dividing by the solute's molecular mass, we may compute the number of moles of solute. The result is molarity when it is divided by total volume.
By determining the number of moles of solute using the same method as previously, the volume of a specific mass in a given gram of solution can also be computed. then divided by the specified molarity to determine the solution's total volume.
Given,
Mass (m)= 34.5 g
Molar mass of NaCl= 35.5 + 23= 58.5
Volume of solution= 250 mL= 0.25 L
M= (34.5/ 58.5)/ 0.25
M= 2.356 moles/ Litre
So, the molarity of the solution having mass 34.5 g of solute and 250mL volume will be 2.356 moles/ litres.
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What volume of O2 at 988 mmHg and 31 °C is required to synthesize 18.5 mol of NO? Express your answer to three significant figures and include the appropriate units.
1) Balance the chemical equation.
[tex]4NH_{3(g)}+5O_{2(g)}\rightarrow4NO_{(g)}+6H_2O_{(g)}[/tex]2) Moles of oxygen needed to produce 18.5 mol NO.
The molar ratio between NO and O2 is 4 mol NO: 5 mol O2.
[tex]mol\text{ }O_2=18.5\text{ }mol\text{ }NO*\frac{5\text{ }mol\text{ }O_2}{4\text{ }mol\text{ }NO}=23.125\text{ }mol\text{ }O_2[/tex]3) Volume of oxygen required.
3.1- List the known and the unknown quantities.
Sample: O2.
Temperature: 31 ºC.
Pressure: 988 mmHg.
Moles: 23.125 mol.
ideal gas constant: 0.082057 L * atm * K^(-1) * mol^(-1)
Volume: unknown
3.2- Set the equation.
[tex]PV=nRT[/tex]3.3- Converting units.
Temperature: ºC to K.
[tex]K=ºC+273.15[/tex][tex]K=31\text{ }ºC+273.15=304.15\text{ }K[/tex]Pressure
760 mmHg = 1 atm.
[tex]atm=988\text{ }mmHg*\frac{1\text{ }atm}{760\text{ }mmHg}=1.3\text{ }atm[/tex]3.4- Plug in the known quantities in the ideal gas equation and solve for V (liters).
[tex](1.3\text{ }atm)(V)=(23.125\text{ }mol\text{ }O_2)(0.082057\text{ }L*atm*K^{-1}*mol^{-1})(304.15\text{ }K)[/tex][tex]V=\frac{(23.125molO_2)(0.082057L*atm*K^{-1}*mol^{-1})(304.15K)}{1.3\text{ }atm}[/tex][tex]V=443.958\text{ }L[/tex]The volume of O2 required is 444 L.
ionic bond formation by correctly pairing these terms: cation, anion, electron gain, and electron loss.
Answer:
cation - electron loss hence positive charge
anion - electron gain hence negative charge
The given terms are correctly paired thus: anion is to electron gain while cation is to electron loss.
What is ionic bond formation?Ionic bond formation is defined as the formation of an ionic bond during a chemical reaction whereby an atom losses electrons while another gains electrons through transfer of these electrons.
For example in the formation of the compound NaCl. Sodium is the element that donates an electron from its outermost shell to chloride. Therefore, the sodium atom is the cation.
Also the chloride element would accept electron from the sodium, therefore, it is called the anion.
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What determines how high-pitched or low-pitched sounds are? (Select all that apply.) Pitch is determined by the volume of the sound. Pitch is determined by the wavelength of the sound wave. Pitch is determined by the direction of the sound. Pitch is determined by the distance between points of compression.
Answer:
frequency
Explanation:
Sounds are higher or lower in pitch according to the frequency of vibration of the sound waves producing them. A high frequency (e.g., 880 hertz [Hz; cycles per second]) is perceived as a high pitch and a low frequency (e.g., 55 Hz) as a low pitch.
List three things that use light energy, and explain how they use it.
Answer:
Pick from many options. Suggested are:
Plant metabolism for storing light energy as carbohydrates
Heating and drying
Electricity
Explanation:
There are many choices:
Light energy is used for:
Plant metabolism: the sun's light energy is absorbed by the chlorphyll where it eventually gets stored as carbohydrates and other plant biological building blocks.ElectricitySolar panels convert light energy into electricityInformation. Light transmits information that is used used for seeing and for communicating with sattelites and the KlingonsHeatingSunbathingDrying. Foods are died in the sun to drive off water.31.The following equation represents which of the following types of reaction?4 H3PO4 ---> P4 + 5 O2 + 6 H2OSelect one:a. Decomposition.b. Double replacement.c. Single replacement.d. Synthesis.
Answer
A. Decomposition.
Explanation
A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products.