Answers
Answer:
6.8 mole of O₂
Explanation:
Given expression:
2H₂ + O₂ → 2H₂O
Number of moles of H₂ = 13.6moles
Unknown:
Number of moles of O₂ = ?
Solution:
In the given problem, we are to find the number of moles of oxygen gas that will use up 13.6mole of hydrogen gas;
From the reaction equation;
2 mole of H₂ will completely react with 1 mole of O₂
13.6 moles of H₂ will completely be used up by [tex]\frac{13.6}{2}[/tex] mole of O₂
= 6.8 mole of O₂
Related Questions
what is the relationship between kinetic energy and velocity ?
Answers
If 5.0 liters H2 (g) at STP is heated to a temperature of 985, pressure remaining constant, the new volume of the gas will be?
Answers
Answer:
[tex]V_2=18 \ L \ H_2[/tex]
General Formulas and Concepts:
Chemistry - Gas Laws
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KCharles' Law: [tex]\frac{V_1}{T_1} =\frac{V_2}{T_2}[/tex]Explanation:
Step 1: Define
Initial Volume: 5.0 L H₂ gas
Initial Temp: 273 K
Final Temp: 985 K
Final Volume: ?
Step 2: Solve for new volume
Substitute: [tex]\frac{5 \ L \ H_2}{273 \ K} =\frac{x \ L \ H_2}{985 \ K}[/tex]Cross-multiply: [tex](5 \ L \ H_2)(985 \ K) = (x \ L \ H_2)(273 \ K)[/tex]Multiply: [tex]4925 \ L \ H_2 \cdot K = 273x \ L \ H_2 \cdot K[/tex]Isolate x: [tex]18.0403 \ L \ H_2 = x[/tex]Rewrite: [tex]x=18.0403 \ L \ H_2[/tex]Step 3: Check
We are given 2 sig figs as the smallest. Follow sig fig rules and round.
[tex]18.0403 \ L \ H_2 \approx 18 \ L \ H_2[/tex]
how to know the unknown metal in flame test
Answers
Explanation:
The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a Bunsen burner. The heat of the flame excites the electrons of the metals ions, causing them to emit visible light
Exothermic reactions release energy. Where is the energy used for these reactions to occur stored? .
Answers
Answer:
In the chemical bonds.
Explanation:
There are different types of chemical bonds, some store a TON of energy while others do not store as much. You can think of it like this: for bonds with low energy, it takes a LOT of force to pull them apart, meaning they are strong bonds. However, this way, you have to put energy into them to break the bonds and form a chemical reaction. This is an endothermic reaction, a reaction that absorbs heat from its surroundings.
Instead, bonds in exothermic reactions are BEGGING to form a more stable bond, and hence store a lot of potential energy. Due to the difficulty of maintaining these bonds, there is a lot of energy put into them. If you break them, however, (exothermic reaction) the energy is released, and hence the exothermic reaction happens.
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The technology in the picture produces which energy conversion?
O A. Chemical energy to kinetic energy
O B. Kinetic energy to electrical energy
O c. Thermal energy to kinetic energy
D. Light energy to electrical energy
Answers
Answer:
Its D. Light energy to to electrical energy
Explanation:
Answer:
D. Light energy to electrical energy
Explanation:
its lowkey obvious lol
Loose sugar dissolves much faster than a sugar cube because loose sugar?
A. Has greater surface area
B. Has less kinetic energy
C. Has a higher temperature
D. Has greater surface tension
Answers
Loose sugar dissolves much faster than a sugar cube because loose sugar (a) has greater surface area.
When any solute dissolve in ground into small pieces it dissolve faster in solvent than large pieces because in small ones the large surface area is exposed into solvent.
With the greater surface area is exposer, the contact in between the solute particles and the solvent is more. this is the reason that loose sugar cube dissolve much faster than sugar cube as sugar cube has less surface area in contact with solvent.
Thus, Loose sugar dissolves much faster than a sugar cube because loose sugar (a) has greater surface area.
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In the reaction 2Li(s) + 2H2O(I) -> 2LiOH(aq) + H2(g), which compound is in the aqueous state?
A. Li
B. H2O
C. LiOH
B. H2
Answers
Answer:
LiOH
Explanation:
LiOH has the tag "aq" which stands for aquatic.
Our answer is LiOH.
How many grams of glucose are in 4.5x1023 molecules of glucose?:
Answers
Answer:
[tex].5865 \\ \\ \\ \\ \\ \5865[/tex]
[tex] \\ \\ 5865 \inf \inft \cos( \\ \) [/tex]
Please help me !!!!!!
Answers
Answer:
30 N
Explanation:
To find force you multiple mass by acceleration. If you multiple 10kg by 3 m/s you then get 30 N.
Answer:
30 N
Explanation:
Force can be found by multiplying the force by the acceleration.
F=m*a
The mass of the bowling ball is 10 kilograms. The acceleration is 3 meters per second squared.
• m= 10 kg
• a= 3 m/s^2
Substitute the values into the formula.
F= 10 kg * 3 m/s^2
Multiply.
F= 30 kg*m/s^2
• 1 kilogram meter per second squared is equal to 1 Newton.
• Therefore our answer of 30 kg*m/s^2 is equal to 30 Newtons.
F= 30 N
The correct answer is B. 30 Newtons.
Which screw would create a strong hold?
A: The screw with 9 wraps.
B: The screw with 2 wraps.
C: The screw with 10 wraps.
D: The screw with 6 wraps.
Answers
Answer:
The screw with 10 wraps is the correct answer
Explanation:
The screw with 6 wraps would create a strong hold.
What do you mean by screw?The strongest member of the family of wood screws is a lag screw. It is a reliable and sturdy fastener that frequently has a square head or an externally powered hex drive.
In general, lag screws are significantly stronger and heavier than standard wood screws. They have a tapered point and coarse threads.
Thus, The screw with 6 wraps would create a strong hold.
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A student was traveling to see his grandmother who lives 15 miles north of his home. He started from rest and maintained a pace of 4 m/s before stopping at his grandmother’s house for lunch. (8.6B) Which of the following best describes the speed, velocity, and acceleration of the student’s walk?
Answers
Answer:
He traveled at a speed of 4 m/s with a velocity of 4m/s north, and his acceleration changed when stopping for lunch.
Explanation:
Trust me took test got it right!
what is the density of a 100g piece of titanium if a 10g piece of titanium has a density of 4.506g/cm3?
Possible answers:
A: 45.06g/cm3
B:4.506g/cm3
C: 9.1g/cm3
D: 91g/cm3
Answers
Answer:
B. Density stays the same no matter how much of a substance there is.
Explanation:
Density of the substance is the same and it is the measure of its mass per unit volume. Thus, the mass of titanium per 1 cm³ is 4.506 g which is the same for 10 g, 100 g or whatever the mass.
What is density ?Density of a substance is the measure of its mass per unit volume. It describes how closely its particles are packed. Density of an object depends on its bond type, temperature and pressure.
The more denser the object is , more will be its mass distribution per unit volume. Substances denser than water will sink on it otherwise they float on water.
Density is constant for a substance, the distribution of given mass per unit volume is same for all masses. Hence, the density of 100 g Ti is same as that of 10 g. i.e., 4.56 g/cm³.
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Oxygen molecules come from....
air
Starches
Proteins
food
Answers
Answer:
air
Explanation:
The main source of oxygen molecules is the air around us. Air is made up of 21% of oxygen gas which is the second most abundant gas found in the atmosphere.
Starch, Proteins and food are all made up of complex organic molecules. Air is a mixture of many gases. Gaseous exchange is made possible when air supplies oxygen and takes carbon dioxide away. Oxygen is an essential gas in the metabolic process of animals.A chemistry teacher is able to grade chemistry labs at a rate of 5 labs for every 3 minutes. They need to grade 165 labs how many hours will it take?
Answers
Answer:
1.65hr
Explanation:
Given parameters:
Number of labs = 5 labs
Time taken = 3 minutes
Unknown:
Time taken in hours to grade 165 labs = ?
Solution:
Let us find the rate of the teacher;
Rate = [tex]\frac{number of labs}{time}[/tex]
Insert the parameters and solve;
Rate = [tex]\frac{5}{3}[/tex] = 1.67labs/min
Now;
Time to grade 165 labs = [tex]\frac{number of labs}{rate}[/tex]
Time to grade 165 labs = [tex]\frac{165}{1.67}[/tex] = 98.8min
Since;
60min = 1hr
98.8min = [tex]\frac{98.8}{60}[/tex] = 1.65hr
i really need help pls, will pay anything
Answers
Explanation:
For the first part,
Reaction equation:
N₂ + 3H₂ → 2NH₃
Given:
Number of moles of NH₃ = 6 moles
Unknown:
Number of moles of N₂ = ?
Solution:
N₂ + 3H₂ → 2NH₃;
From the reaction above, we solve from the known specie to the unknown. Ensure that the equation is balanced;
2 moles of NH₃ is produced from 1 mole of N₂
6 moles of NH₃ will be produced from [tex]\frac{6}{2}[/tex] mole of N₂
= 3moles of N₂
The number of moles of N₂ is 3 moles
ii.
Given parameters:
Number of moles of sulfur = 2.4moles
Molar mass of sulfur = 32.07g/mol
Unknown:
Mass of sulfur = ?
Solution:
The number of moles of any substance can be found using the expression below;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Mass of sulfur = number of moles of sulfur x molar mass
Insert the parameters and solve;
Mass of sulfur = 2.4 x 32.07 = 76.97g
a balanced chemical equation is an equation which shows that the total mass is conserved during a chemical reaction. Which of the following chemical equation agree with the statement. 1)Na+Cl2=NaCl 2)Na+H2O=NaOH+H2 3)C+O2=CO2 4)CaCO3=CaO+CO2.
Answers
Answer:
c )C02
d)CaO + CO2
Explanation:
the masses of the elements are conserved
what is the molecular formula of carbohydrate
Answers
Answer:
Carbohydrates can be represented by the stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule. Therefore, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules.
Explanation:
May I have brainliest please? :)
Answer:
(CH2O)n, where n is the number of carbons in the molecule.
Explanation:
Also remember the 1:2:1 ratio of carbon:hydrogen:oxygen
Dating of rock layers which layer is the youngest f,A,s,h,b,d,c,e
Answers
Answer:
E is the anwser
What is the charge on a calcium atom that contains 18e−?
Answers
Answer:
13 +2 =15
Explanation:
iron is a :
A. substance
B. heterogenous mixture
C. homogenous mixture
Answers
Answer:
a: iron is a substance
Explanation:
because its hard and brittle and classified as a metal
what is the approximate size of e coli
Answers
Answer:
Escherichia coli is a typical gram-negative rod bacterium. Its dimensions are those of a cylinder 1.0-2.0 micrometers long, with radius about 0.5 micrometers. Another gram-negative rod, less metabolically independent than E. coli, is Hemophilus influenzae, which has half the length and diameter.
Explanation:
Which property of waves is the distance between one point on a wave and that same point on the wave next to it?
A.
amplitude
B.
wavelength
C.
frequency
D.
speed
Answers
I am in the second period and belong to the same family as silicon
Answers
Answer:
carbon
Explanation:
carbon has 6e- hence belong to group 4 and period 2
Answer:
Boron
Explanation:
Both silicon and boron are metalloids, and boron belongs on the second row (period)
A student asks a serious of questions about a wave. The answer to which question will allow the student to determine whether the wave is electromagnetic or mechanical?
Answers
Answer:
Does the wave require a medium in order to travel?
Explanation:
The question whose answer would determine whether the wave in question is mechanical or electromagnetic would be if the wave requires a medium in order to travel or otherwise.
A mechanical wave would require a medium in order to transport its energy from one place to another, that is, travel. On the other hand, an electromagnetic wave does not require any medium in order to travel, that is, it can travel through vacuums or empty spaces. Light and sound waves are typical examples of electromagnetic and mechanical waves respectively.
write the complete balanced equation for the decomposition of AI(CIO3)3.
Answers
Answer:
2AL(ClO3)3 → 2ALCl3 + 9O2
Explanation:
How many orbitals surround the nucleus in a neutral atom of sulfur (S)?
1
3
5
6
Answers
Select ALL of the following statements that are incorrect.
Solids, liquids, and gases are all able to act as solutes in a solution.
Solids, liquids, and gases are all able to act as solvents in a solution.
Solids are not able to act as a solvent if a gas is the solute.
Gases are not able to act as a solvent if a solid is the solute.
Answers
Answer:the 4th one is incorrect,and the 1st one is incorrect hope this helps.
Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.
Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.
On the other hand, gases can also act as a solvent if a solid is the solute.
Explanation:
Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.
Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.
On the other hand, gases can also act as a solvent if a solid is the solute.For example, air present in the surrounding acts as a solvent and solid substances present in the surrounding acts as a solute.
Hence, the statement gases are not able to act as a solvent if a solid is the solute, is false.
Thus, we can conclude that following are the statements which are incorrect.
Solids are not able to act as a solvent if a gas is the solute.
Gases are not able to act as a solvent if a solid is the solute.
Which of these most likely occurs to result in the formation of these mountains?
Answers
Answer:
thanks
Explanation:
youre awesome
The production of 2-methyl-2-phenyl propane. This would be a two-step synthesis.
Can someone explain what is this reaction ?
Answers
Earth's atmosphere blocks short wavelengths of the electromagnetic spectrum. Which telescopes must be places in orbit around Earth in order to observe short-wavelength radiation?
Answers
Answer: gamma-ray telescopes
Explanation:
this is the answer because the question is asking what telescope must be
placed to observe SHORT-WAVELENGTH radiation. Gamma-rays have very short wave-lengths so therefore it would be gamma-ray telescopes. visible, infrared, and radio all have long wave-lengths, so we can instantly eliminate them.
The Earth's atmosphere is known to be able to blocks all X-rays from space. telescopes must be places in orbit around Earth in order to observe short-wavelength radiation is gamma-ray telescope.
X-rays is known to have high energy that are in reflecting telescope. Gamma rays from space is commonly blocked by the Earth's atmosphere as the radiation is lethal.
Gamma-ray telescope is known to be an instrument that is created to detect and resolve gamma rays from space. that is beyond Earth's atmosphere.This rays are able too be detected by the optical flashes that they emit when interacting with the material in a particular defined instrument.
Learn more about Gamma-ray telescope from
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