The value of x in the gas C₅Hx is 12.
Calculation:-
PV = nRT
n = PV/RT
= 2 × 0.32 / 0.08 × 400
= 0.64 / 32
= 0.02
mole = mass/molar mass
molar mass = mass/ mole
= 1.44/0.02
= 72 grams.
C5Hx = 72
12 × 5 + x = 72
x = 72 - 60
x = 12
An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.
An ideal gas is described as one for which both the extent of molecules and forces between the molecules are so small that they have got no effect on the behavior of the gas. The real gas that acts almost like a really perfect gasoline is helium. that is due to the fact helium, in contrast to maximum gases, exists as an unmarried atom, which makes the van der Waals dispersion forces as low as viable.
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Explain briefly why the tendency of a polymer to crystallize decreases with increasing molecular weight.
As the molecular weight increases, polymers tend to crystallize due to how harder it is for chains that are side by side to align due to the increasing length of the chain which makes it difficult to turn out the ordered atomic array.
How does polymer crystallize?Polymers can be natural or synthetic substances. Polymers can be crystalline or amorphous, depending on how their molecular chains are structured.
Polymers are found in proteins and nucleic acids. Crystalline polymers, have chains that are positioned together, they don't bend easily under pressure. A typical example of a crystalline polymer is a diamond-hard structure.
In summary, whenever there is an increase in molecular weight, there is always a notable decrease in crystallinity. The crystallinity of a polymer generally affects its properties which include properties such as the density of the polymer and its hardness.
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Select the statements below that are true when an ice cube is placed in a glass of hot water.Choose one or more:DA qice qwater=B. qwater = -qiceOC. The energy gained by the ice cube will be equal to the energy lost by the water.D. Thermal energy will flow from the ice cube to the water.OE. The energy lost by the ice cube will be equal to the energy gained by the water.F. Thermal energy will be transferred from the water to the ice cube.
In this question, we have a situation where an ice cube is placed in a glass of hot water, which means we have a situation of exothermic and endothermic reactions occurring.
The endothermic reaction will be related to the ice cube, since this cube will increase its temperature, and in order to do that, the cube needs to absorb energy, and this thermal energy will come from the hot water
The exothermic reaction is the hot water releasing this thermal energy to its surroundings, and then the temperature will decrease as well
The options that are the answers will be:
C
F
Letter B should be the opposite, -qwater = qice, and letter A doesn't show the positive or negative sign
A spray paint can at 24 Celsius has a pressure of 20 psi. If it is placed in a fire at 480 Celsius what will the pressure become?
According to Gay Lussac's law, the pressure of a given mass of gas is directly proportional to its temperature provided that volume is constant. Mathematically;
[tex]\begin{gathered} P\alpha T \\ P=kT \\ k=\frac{P}{T} \\ k=\frac{P_1}{T_1}=\frac{P_2}{T_2} \end{gathered}[/tex]From the given question, we are given the following parameters:
[tex]\begin{gathered} P_1=20psi \\ T_1=24^0C=24+273=297K \\ T_2=480^0C=480+273=753K \\ P_2=\text{?} \end{gathered}[/tex]Substitute the given parameters into the formula as shown:
[tex]\begin{gathered} P_2=\frac{P_1T_2}{T_1} \\ P_2=\frac{20psi\times753\cancel{K}}{297\cancel{K}} \\ P_2=\frac{15,060}{297} \\ P_2=50.71\text{psi} \end{gathered}[/tex]Therefore the pressure of the spray paint at 480 celsius is 50.71psi
what is the concentration of a naoh solution if 26.96 ml are needed to titrate 0.5930 g of khp? enter your answer with a unit of m.
0.000107 mol is the concentration of a NaOH solution if 26.96 ml are needed to titrate 0.5930 g of KHP.
What is KHP?KHP, also known as potassium hydrogen phthalate, is an acidic salt chemical. It produces a colorless solution, a white powder, colorless crystals, and an ionic solid that is the monopotassium salt of phthalic acid.
Moles of KHP= 0.5930/204.22g/mol
Moles of KHP=0.0029mol
now when26.96 ml are needed
concentration=0.0029/26.96
Concentration=0.000107 mol
Hence,0.000107 mol is the concentration of a NaOH solution if 26.96 ml are needed to titrate 0.5930 g of KHP.
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The metalloids are located along
a stair-step line between the metals and the
nonmetals on theperiodic table. Referring to the
periodic table as needed, draw the stair-step line
on this table. Then, write the symbol for each
metalloid in the correct location on this table.
Here is the diagram which it shows the arrangement of metalloids in the modern periodic table.
Metalloids are the elements which shows both the characteristics of metals and non-metals.
Boron - B, Silicon - Si, Germanium - Ge, Arsenic - As, Antimony - Sb, Tellurium - Te, Polonium - Astatine are the elements belongs to metalloids
question content area use the references to access important values if needed for this question. what atomic or hybrid orbitals make up the sigma bond between si and h in silane, sih4? orbital on si orbital on h what is the approximate h-si-h bond angle?
sp^3 is the hybrid orbitals make up the sigma bond and 1s is the orbital on si orbital on h and bond angle is 120.
In a complex molecule or ion, the angle between two orbitals that contain bonding electron pairs, or bonds, that are arranged around the centre atom is referred to as the bond angle. Using a spectroscopic approach, it is estimated and measured in degrees. How many lone electron pairs are present affects the bond angles. For instance, boron trichloride has a trigonal planar structure, no lone pairs, a bond angle of 120 degrees, and none of these characteristics.
Hybrid orbitals are created by combining the atomic orbitals of a single atom in a model in a way that creates a fresh set of orbitals with geometries suitable for forming bonds in the directions suggested by the VSEPR model. In order to create new hybrid orbitals, atomic orbitals are mixed.
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PLEASE ANSWER SCIENCE
The great Rift valley is a large land fracture that extends 3000 kilometers across the African continent. the process form the great rift valley is The widening of the crust along a divergent boundary as two plates carrying continental crust pull apart.
Rift valley is long narrow valley formed in the dispersion of block of earth crust. Rift valley is found in land as well as in bottom of ocean due to seafloor spreading. rift valley formed by the tectonic action. one of the example of divergent boundary is the great rift valley.
Thus, The great Rift valley is a large land fracture that extends 3000 kilometers across the African continent. the process form the great rift valley is The widening of the crust along a divergent boundary as two plates carrying continental crust pull apart.
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If a sample of 17.3 moles of gas at a pressure of 7.5atm and at a temperature of 306K, what is the volume of the container that the gas is in?
ANSWER
The volume of the container that the gas is in is 57.9L
EXPLANATION
Given that
The moles of the gas is 17.3 moles
The pressure of the gas is 7.5 atm
The temperature of the gas is 306K
Follow the steps below to find the volume of the container
Step 1; Assume the gas behaves like an ideal gas
[tex]\text{ PV = nRT}[/tex][tex]\begin{gathered} \text{ R is 0.08205 L.atm. mol}^{-1}.K^{-1} \\ \text{ 7.5 }\times\text{ V = 17.3 }\times\text{ 306 }\times\text{ 0.08205} \\ \text{ 7.5V = 434.36} \\ \text{ Divide both sides by 7.5} \\ \text{ }\frac{7.5V}{7.5}\text{ = }\frac{434.36}{7.5} \\ \text{ V = 57.9L} \end{gathered}[/tex]Therefore, the volume of the container that the gas is in is 57.9L
PLEASE LOOK AT IMAGINE SCIENCE
Answer: C
Explanation: because Pangaea broke apart and made smaller continents.
calculate the energy in joules released by the fusion of a 1.25 -kg mixture of deuterium and tritium, which produces helium. there are equal numbers of deuterium and tritium nuclei in the mixture.
4.2 × 10^14 J will be the energy released by the fusion of a 1.25 -kg mixture of deuterium and tritium, which produces helium.
Emitted energy in the reaction will be
E = (1876.136 + 2809.45) (3728.42 +939.565)
E =017.6 Mev
Now total atomic bar weight A = (2+3) = 5 grams
total no of atoms = 2Na
for 1-25 kg
= (2Na/5)X1250
= (2x6.023×10^23/5)*1250
= 3.0115×10^26
In Joules released energy in fusion a 1.25kg mixture of denterium and trilium will be
Q = 2.65 × 10^33 × 1-6 × 10^-19 J
= 4.2 × 10^14 J
the energy released by the fusion deuterium and tritium is 4.2 × 10^14 J.
the complete question is:
The atomic masses of deuterium and tritium are 2.014102 u and 3.016049 u respectively. Calculate the energy in joules released by the fusion of a 1.25 -kg mixture of deuterium and tritium, which produces helium. There are equal numbers of deuterium and tritium nuclei in the mixture
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Chlorine can bond with fluorine to form ClF. Chlorine can also bond with lithium to form LiCl. Which compound will have a greater partial charge?Question 2 options:A) Both compounds will have the same partial charge.B) ClFC) LiClD) Neither compound will have partial charge.
In this question, we have two compounds, ClF and LiCl. The first molecule is a covalent compound, since we will not have donation of electrons but instead the sharing of electrons, but in this case, the difference of the electronegativity will cause this molecule to have Polar covalent bond, which will cause partial charges to occur. LiCl is a molecule in which we have a greater difference in electronegativity, which makes this molecule be an ionic molecule, and not covalent. Since ionic compounds have real charges, the only possible answer will be ClF, since they have partial charges. Letter B
It’s a practice worksheet, the name is reduction / oxidation reactions need help with number 2 please
Answer
Explanation
The given equation for number 2 is:
[tex]3Hg^{2+}+2Fe(s)\rightarrow3Hg_2+2Fe^{3+}[/tex]Note that: When a reactant loses electrons during a reaction, it is called oxidation. When a reactant accumulates electrons during a reaction, it is called reduction.
What is the frequency of a red light with a wavelength of 650 nm?
Answer:
It would be approximately 4.61 x 10^14 Hz
Explanation:
Well if a narrow beam that is at a wavelength of approximately[tex]650 nm (650 x 10^{-9}m)[/tex] would correspond to a frequency of approximately[tex]6.61 x 10^14 Hz[/tex] which would make it be a few hundred terahertz.
Hope this helps :)
Answer:
approximately 4.61 x 10^14 Hz
what happens when mix vinegar and baking soda???
is for science project
Answer:
The mixture quickly foams up with carbon dioxide gas.
Explanation:
Answer:
Explanation:
When you mix vinegar and baking soda, you will get an acid solution.
25.As a solution becomes more acidic, the pH of the solution...Select one:a. increases.b. decreases.c. remains unchanged.d. quickly increases and then gradually decreases.
Answer:
[tex]B\text{ : decreases}[/tex]Explanation:
Here, we want to know what happens to a solution that becomes more acidic
A lesser ph (1-7) indicates acidity with the acidity being higher as the number becomes smaller
What this means is that a solution with a pH of 3 is more acidic than a solution with a pH of 5
Thus, when the acidity increases, it is expected that the pH of the solution decreases (it becomes smaller in number)
THE RIGHT GETS 10 POINTS AND BRAINLIEST
Which layer is between the asthenosphere and the outer core? (7 points)
a
Crust
b
Inner core
c
Lithosphere
d
Mesosphere
The layer which is between the asthenosphere and the outer core is referred to as the Lithosphere and is denoted as option C.
What is Lithosphere?
This is referred to as the outermost rocky layer of the earth and has a rigid structure. It is made up of the crust and the solid outermost layer of the upper mantle which is the reason why it has a rigid structure.
It can also be described as the region or layer which is between the asthenosphere and the outer core which is therefore the reason why it was chosen as the correct choice.
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Give the name for the formula PbO
34 °F a K no entiendo nada
Answer:
274.2 K
Explanation:
to get from Fahrenheit to Celsius you use your known value, 34 F, and subtract it by 32 = 2, then you multiply it by 5/9 (or .5556) = 1.1 C
to get from Celsius to Kelvin, you just add 273.15, therefore your Kelvin would be 274.2.
(no hablas ingles..)
para pasar de Fahrenheit a Celsius usas tu valor conocido, 34 F, y lo restas por 32 = 2, luego lo multiplicas por 5/9 (o .5556) = 1.1 C
para pasar de Celsius a Kelvin, solo sumas 273,15, por lo que tu Kelvin sería 274,2.
Balance Equation:__H2O + __ F2 > __HF + __O2
Explanation:
We have to balance the following equation:
__ H₂O + __ F₂ -------> __ HF + __ O₂
First we have to determine the number of atoms of each element that we have on both sides of the equation.
__ H₂O + __ F₂ -------> __ HF + __ O₂
O: 1 O: 2
H: 2 H: 1
F: 2 F: 1
We have 2 atoms of O on the right side and 1 atom of O on the left side. To balance the O atoms we can change the coefficient for H₂O and write a 2 in front of it.
2 H₂O + __ F₂ -------> __ HF + __ O₂
O: 2 O: 2
H: 4 H: 1
F: 2 F: 1
Then we have 4 atoms of H on the left and 1 atom of H on the right side of the equation. We can change the coefficient for HF to balance the H atoms.
2 H₂O + __ F₂ -------> 4 HF + __ O₂
O: 2 O: 2
H: 4 H: 4
F: 2 F: 4
And finally we have 2 atoms of F on the left and 4 atoms of F on the right. We can change the coefficient for F₂ and write a 2 there.
2 H₂O + 2 F₂ -------> 4 HF + __ O₂
O: 2 O: 2
H: 4 H: 4
F: 4 F: 4
The equation is balanced.
Answer: 2 H₂O + 2 F₂ -------> 4 HF + O₂
Objective: Apply the concepts of mole and stoichiometry.
Question: If 50.0 g of O₂ are mixed with 4.5 g of H₂ and the mixture is ignited, what mass of water is
produced?
Include a balanced reaction equation, definitions, explanations, and discussion of your problem-solving
process.
The mass of water when 50.0 g of O₂ are mixed with 4.5 g of H₂ and the mixture is ignited is 56.25g. Here the concept of mole can be applied.
What is mole?
A mole can be explained as the substance containing an Avogadro number of particles that is 6.022 x 10^23 particles in it. It can be calculated by dividing the mass of the substance by molecular mass of the substance.
The reaction can be written as,
2H2 + O2 --------> 2H2O
4g 32g 36g
Here, 2 moles of H2 is reacting with 1 mole of O2 to give 2 moles of water. 50.0 g of O₂ are mixed with 4.5 g of H₂ and the amount of oxygen reacting is less so it can be considered as the limiting reagent.
The mass of water = 36g x 50g / 32g = 56.25g
Therefore, 56.25g of water can be formed when 4.5 g of H2 and 50g of O2 is reacting. This can be seen in mole concept of balanced chemical reaction.
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please ANSWER SCIENCE
Answer:
c
Explanation:
Calculate the volume in liters of a 7.76 g/dL iron(III) bromide solution that contains 427. g of iron(III) bromide (FeBr3).Round your answer to 3 significant digits.
Answer
5.50 L of solution
Procedure
We will use dimensional analysis to solve this question. After getting the answer, we will round to 3 significant digits. All the previous can be done in a single-step calculation.
[tex]427\text{ g}\frac{1\text{ dL}}{7.76\text{ g}}\frac{1\text{ L}}{10\text{ dL}}=5.5026\approx5.50\text{ L}[/tex]Most of the weather of the world is based upon changes in the moisture, pressure, and/or temperature of the.
Most of the weather of the world is based upon changes in the moisture, pressure or temperature of the troposphere.
What is the importance of troposphere?The layer closest to the surface of the Earth is troposphere. This layer goes up to twenty kilometers above the Earth. The troposphere is very essential as it contains the weather of the Earth and also greenhouse gases to maintain the temperature on Earth.
Troposphere layer has the air humans breathe and the clouds in the sky. The air is densest in this lowest layer and the troposphere has three-quarters of the mass of the entire atmosphere. The air in troposphere is 78% nitrogen and 21% oxygen.
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why is the melting point for vanillyl alcohol so much higher than that of vanillin? use intermolecular forces to guide your answer.
Because vanillyn alcohol involves intermolecular hydrogen bonding interactions rather than vanillin's weak interactions that result in a stable compound, vanillyn alcohol has a much higher melting point than vanillin.
What is the intermolecular forces ?The attracting and repellent forces that develop between the molecules of a material are referred to as intermolecular forces (IMF), which is sometimes shortened. These forces operate as a mediator between a substance's individual molecules.The majority of matter's physical and chemical characteristics are caused by intermolecular forces.Intermolecular forces are the aggregate name for the forces that exist between the molecules themselves. The primary cause of the substance's physical properties is intermolecular forces. The condensed states of matter are caused by intermolecular forces. Intermolecular forces, which hold the particles that make up solids and liquids together, have an impact on a number of the physical characteristics of matter in these two states.Learn more about Intermolecular forces refer to :
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In a galvanic cell, _______________ occurs at the anode? (1 pt)
*
1 point
oxidation
reduction
In a galvanic cell, oxidation occurs at the anode?
The slogan "Red Cat An Ox" states that reduction happens at the cathode whereas oxidation happens at the anode. The anode would be the negative terminal for such galvanic cell because the anode's reaction serves as the origin of the electrons for such current.
No matter what kind of electrical cell is used, oxidation always occurs at the anode. Galvanic as well as electrolytic cells have reversible both cathode and anode charges.
Therefore, oxidation will happen at anode.
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Use the drop-down menus to identify the class of compounds to which each structure belongs. A skeletal chain goes up, down, up, down to C double bonded to O, up to O H. A skeletal chain goes up to O, down, up, down, up. A hexagonal ring is single bonded to C l on one corner. N has a pair of electron dots above, and is single bonded to R Superscript 1, wedge bonded to H, and wavy bonded to H.
Functional group can be interconverted into each ther by the means of suitable reagent. Functional group are responsible for the chemical and physical properties of a compound.
What is functional group?A group of atoms forming a component of a molecule that accounts for a particular function or chemical behavior is called a functional group. There are so many functional group in organic chemistry.
a. A skeletal chain goes up, down, up, down to C double bonded to O, up to O H is Carboxylic group COOH.
b. A skeletal chain goes up to O, down, up, down, up. A hexagonal ring is single bonded to C l on one corner. this belongs to cyclic substituted compound.
c. N has a pair of electron dots above, and is single bonded to R Superscript 1, wedge bonded to H, and wavy bonded to H. This belongs to primary amine compound.
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Hey y’all I’m having trouble understanding this, I would appreciate it if someone helped
By allocating algebraic variables as stoichiometric coefficients to each species in the unbalanced chemical equation, this method balances chemical equations.
H₂ + O₂ → H₂OBalancing it we get,
2H₂ + O₂→ 2 H₂O
N₂ + H₂ → NH₃Balancing it we get,
N₂ + 3H₂ → 2NH₃
H₂ + O₂→ H₂OBalancing it we get,
2H₂ + O₂→ 2 H₂O
K + H₂O → KOH + H₂Balancing it we get,
2K + 2H₂O → 2KOH + H₂
CH₄ + O₂→ CO₂ + H₂OBalancing it we get,
CH₄ + 2O₂ →CO₂ + 2H₂O
Fe + HCl → H₂ + FeCl₃Balancing it we get,
2Fe +6 HCl →3 H₂ + 2FeCl₃In this way all the chemical equations get balanced by balancing their coefficients stepwise.
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what is the concentration (m) of ch3ohch3oh in a solution prepared by dissolving 14.4 g of ch3ohch3oh in sufficient water to give exactly 230 ml of solution?
The value of molarity is 1.589mol/dm3.
How to find molarity ?While molarity is concerned with the moles of a solute in respect to the volume of a solution, molality discusses the moles of a solute in relation to the mass of a solvent.
The quantity of a material dissolved in a given mass of solvent is known as its molality (m), also known as molal concentration. The moles of a solute per kilogram of a solvent are how it is defined.
The quantity of a material in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.
Molarity equation : M = moles solute / liters solution
Given data
liters of solution = 230ml
mass = 11.7g
moles of solutes = mass/molar mass
molar mass of CH3OH= C(12)+H(1*3) +O(16)+1 =32g
so, moles of solutes= 11.7g/32g =0.365mol.
Molarity= 0.365mol/230*10^-3 = 0.365mol/0.230L= 1.589mol/dm3.
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Which map would you bring with you as you navigate the wilderness?
The map that would I bring with me as I navigate the wilderness is Topographic maps.
Why carry Topographic maps?Because topographic maps use contour lines to indicate the geometry of landforms, they are excellent for wilderness navigation (mountains, valleys, ridges, saddles).
Reading topographic maps has somewhat lost some of its appeal with the development of reliable, accurate GPS devices and phone navigation apps.
However, no matter how sophisticated and costly your equipment is, it could still run out of batteries, malfunction due to excessive dampness, cease functioning in the cold (cough, iPhones), or fall off a cliff and smash.
Additionally, the satellite signal that your device requires to locate you will always decide to go out at the worst possible time.
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What is the percent of chloride ion in a sample if 2. 500 g of the sample produces 1. 750 g of agcl when treated with excess ag⁺? report your answer to two decimal places.
The percent of chloride ion in a sample if 2. 500 g of the sample produces 1. 750 g of agcl when treated with excess ag⁺ is 17.2 percent.
What is mass percent?
The ratio of the mass of the solute contained in a solution to the mass of the solution as a whole is known as the mass percent.
Explanation:
Given:
Mass of sample = 2. 500 g
Mass of AgCl = 1. 750 g
The percent of chloride ion in a sample is calculated as,
Molar mass of AgCl = 143.32 g/mol
[tex]Molar mass of Chlorine atom = 35.45 g/mol[/tex]
Assume that all of the sample's chlorine has precipitated into silver chloride. As a result, the amount of chlorine in silver chloride will match the amount of chlorine in the sample.
First we have to find mass of chlorine,
[tex]In 143.32 g of silver chloride, mass of chlorine present is 35.45 gSo, in 1.3487 g of silver chloride, mass of chlorine present will be =35.45g/143.32 g * 1.750 g = 0.43 g[/tex]
Therefore, the percent of chloride ion in a sample is
[tex]Mass of pure chloride compound = 2.500 gMass of chlorine = 0.43 g%Chlorine = 0.43/2.5 *100%Chlorine = 17.2 %[/tex]
Hence, the percent of chloride ion in a sample is [tex]17.2%[/tex] percent.
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