what does the S in S8 represent (Select All that Apply)

• An atom of Sulfur
• An isotope of Sulfur
• An allotrope of Sulfur
• A collection of atoms of Sulfur

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:

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.

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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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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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.

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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To determine the moles of a compound from the mass in grams, we must use the molecular mass. The molecular mass is calculated by adding the atomic weights of the elements multiplied by the atoms of the element present in the molecule. To make it easier we can make the following table:

We have that the molar mass of CHCl3 is: 119.377g/mol.

The number of moles will be:

In 16.0g pf CHCl3 there are 0.134 moles

The melting point of a substance can be predicted by comparing the relative strength of their intermolecular forces.

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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Explanation:

a) First, let's find out how many moles are there into 250 mL of orange juice:

0.00214 mol ---- 1000 mL (1L)

x mol ---- 250 mL

1000x = 250 * 0.00214

x = 0.535/1000

x = 5.35 x 10^-4 mol

Now let's transform it to grams. For this, we need to use the molar mass of vitamin C and the following formula: m = n*MM

MM of vitamin C = 176 g/mol

m = 5.35 x 10^-4 * 176

m = 0.09416 g

m = 94.16 mg

Answer a): 94.16 mg of vitamin C

b) Let's transform 80 mg of vitamin C into moles using the formula: n = m/MM

m of vitamin cC = 80 mg = 0.08 g

MM = 176 g/mol

n = 0.08/176

n = 4.54 x 10^-4 moles

Now let's calculate the quantity in mL:

0.00214 mol ---- 1000 mL (1L)

4.54 x 10^-4 moles ---- x mL

0.00214x = 4.54 x 10^-4 * 1000

x = 0.4545/0.00214

x = 212 mL

Answer b): 212 mL

Calculation of the molar mass of C6H8O6:

(6*12)+(8*1)+(6*16) = 176 g/mol

Answer:

Explanation:

a) First, let's find out how many moles are there into 250 mL of orange juice:

0.00214 mol ---- 1000 mL (1L)

x mol ---- 250 mL

1000x = 250 * 0.00214

x = 0.535/1000

x = 5.35 x 10^-4 mol

Now let's transform it to grams. For this, we need to use the molar mass of vitamin C and the following formula: m = n*MM

MM of vitamin C = 176 g/mol

m = 5.35 x 10^-4 * 176

m = 0.09416 g

m = 94.16 mg

Answer a): 94.16 mg of vitamin C

b) Let's transform 80 mg of vitamin C into moles using the formula: n = m/MM

m of vitamin cC = 80 mg = 0.08 g

MM = 176 g/mol

n = 0.08/176

n = 4.54 x 10^-4 moles

Now let's calculate the quantity in mL:

0.00214 mol ---- 1000 mL (1L)

4.54 x 10^-4 moles ---- x mL

0.00214x = 4.54 x 10^-4 * 1000

x = 0.4545/0.00214

x = 212 mL

Answer b): 212 mL

Calculation of the molar mass of C6H8O6:

(6*12)+(8*1)+(6*16) = 176 g/mol

Explanation:

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.

Answer: they are shiny metals with low melting points

The gas that has more kinetic energy is nitrogen.

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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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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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.

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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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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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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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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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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1) Balance the chemical equation.

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.

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.

3.3- Converting units.

Temperature: ºC to K.

Pressure

760 mmHg = 1 atm.

3.4- Plug in the known quantities in the ideal gas equation and solve for V (liters).

The volume of O2 required is 444 L.

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.

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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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).

Hence, Sanger sequencing requires dideoxynucleotides, although PCR does not.

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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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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.

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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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

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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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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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.

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.

Answer:

Pretty sure its Tilted

Explanation:

Answer: Tilted

Explanation: