Determine the minimum mass of hydrogen gas required to produce


Asked by wiki @ in Chemistry viewed by 759 People


Hydrogen gas reacts with oxygen to form water. 2H2(

g.+O2(
g.→2H2O(
g.ΔH=−483.5kJ Determine the minimum mass of hydrogen gas required to produce 216 kJ of heat.

Answered by wiki @



The reaction is as follows:
2 H₂(g) + O₂(g) → 2 H₂O(g) . ΔH = - 483.5 kJ
Using the change in enthalpy and heat, calculate the moles as follows:
Moles of H₂ = -  \frac{amount of heat released}{ΔH} x 2 mol H₂
                  = - 216 kJ / (-483.5 kJ) x 2 mol H₂ 
                  = 0.893 mol H₂
Calculate the mass of H₂ using the moles and molar mass as follows:
0.893 mol H₂ x (2.02 g H₂ / 1 mol H₂) = 1.79 g H₂
Therefore, the mass of hydrogen gas is 1.79 g


Do you know the better answer?

Similar Questions

Which factor will decrease in response to increased cardiorespiratory fitness

Asked by wiki @ in Health viewed by 306 persons

Which factor will decrease in response to increased cardiorespiratory fitness? A) physical fitness B) cardiorespiratory endurance C) metabolism D) resting heart rate

What is the difference between federal purchases and federal expenditures

Asked by wiki @ in Business viewed by 208 persons

What is the difference between federal purchases and federal​ expenditures? a. federal purchases and federal expenditures both require that the government receives a good or service in return. b. federal …

What do manufacturers use water for

Asked by wiki @ in Biology viewed by 210 persons

What do manufacturers use water for? A. to transport people B. to irrigate farms C.to create tools D.to produce wood and paper products

Discuss the development of the story the tell tale heart

Asked by wiki @ in English viewed by 276 persons

Now that you’ve read “The Tell-Tale Heart” by Edgar Allan Poe, explain in a paragraph how the narrator of this short story directly affects the plot. Be sure to identify …

Arc cd is 1/4 of the circumference of a circle

Asked by wiki @ in Mathematics viewed by 126 persons

Arc CD is 1/4 of the circumference of a circle. What is the radian measure of the central angle?

Which spanish king commissioned the spanish armada

Asked by wiki @ in Spanish viewed by 195 persons

Which Spanish King commissioned the Spanish Armada? Phillip Douglas Skippy Norman

What is the standard deviation of a sampling distribution called

Asked by wiki @ in Mathematics viewed by 275 persons

What is the standard deviation of a sampling distribution called?

Marriage and graduation can be stressful life events

Asked by wiki @ in Social Studies viewed by 203 persons

Marriage and graduation can be stressful life events. a. True b. False

Find the depth of the water directly below the vessel

Asked by wiki @ in Physics viewed by 88 persons

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530 m/s in seawater. How deep is the water directly below the vessel if the time delay …

Why does an empty plate heat up in the microwave

Asked by wiki @ in Physics viewed by 164 persons

Why does an empty paper plate not heat up in the microwave

In exploring human behavior contemporary psychologists rely most heavily on

Asked by wiki @ in Social Studies viewed by 340 persons

In studying human behavior, contemporary psychologists rely most heavily on question options: 1) introspection. 2) psychoanalysis. 3) massed practice. 4) science.

Which compound inequality is equivalent to the absolute value inequality

Asked by wiki @ in Mathematics viewed by 207 persons

Which compound inequality is equivalent to the absolute value inequality |b| greater than 6? –6 > b and b > 6 b > –6 or b < 6 –6 < …

Which of the following layers of earth is the thickest

Asked by wiki @ in Chemistry viewed by 164 persons

Which of these is the thickest layer of the Earth? A) Crust B) Mantle C) Outer core D) Inner core

Draw the expected major elimination product and identify the mechanism

Asked by wiki @ in Business viewed by 284 persons

Draw the expected major elimination product and identify the mechanism

Which statement is correct about a line and a point

Asked by wiki @ in Mathematics viewed by 198 persons

Which statement is correct about a line and a point? Select one: a. A line and a point can be collinear. b. A point has no location, and a line …

How many different judicial systems are there in the us

Asked by wiki @ in Social Studies viewed by 217 persons

How many different judicial systems are there in the United States?

Which two protocols manage neighbor discovery processes on ipv4 networks

Asked by wiki @ in Computers and Technology viewed by 131 persons

Which two protocols manage neighbor discovery processes on ipv4 networks?.

What are the horizontal columns on the periodic table called

Asked by wiki @ in Chemistry viewed by 237 persons

What are columns on the periodic table called? What is the significance of the columns on the periodic table?

Whats half of 21

Asked by wiki @ in Mathematics viewed by 100 persons

What is the half of 21 in a radius​

Which idea is not included in the declaration of independence

Asked by wiki @ in History viewed by 175 persons

HELP PLZ!!!!!!!!! Which idea is NOT included in the Declaration of Independence? A. each person has certain unalienable rights. B. people have the right to alter or abolish corrupt governments. …

4x 7 23

Asked by wiki @ in Mathematics viewed by 94 persons

Here is an equation: 4x+7=23. Explain the steps you would use to solve the equation for x

You are off duty at a park when you witness

Asked by wiki @ in Health viewed by 87 persons

You are off duty at a park when you witness an apparently healthy 12-year-old child suddenly collapse. there are no bystanders around and your mobile phone is in your car. …

Is aluminum foil a pure substance

Asked by wiki @ in Chemistry viewed by 189 persons

Is aluminum foil a mixture or a pure substance?

What affected the american economy immediately after world war i

Asked by wiki @ in History viewed by 247 persons

What affected the American economy immediately after World War I? increase in international trade demobilization of the military rise in the demand for consumer goods tariffs placed by European nations …

Which characterization technique does the author use in the excerpt

Asked by wiki @ in English viewed by 342 persons

Read the excerpt below and answer the question. In the years that followed, I failed her many times, each time asserting my will, my right to fall short of expectations. …

What were four factors that contributed to industrialization in britain

Asked by wiki @ in History viewed by 232 persons

What were four factors that contributed to industrialization in Britain? Y'all I need a correct answer. Ion need no wrong one.

When acetic acid reacts with ammonia nh3 the reaction yields

Asked by wiki @ in Chemistry viewed by 238 persons

When acetic acid reacts with ammonia, NH3, the reaction yields ________.

La profesora cruz prepara la prueba

Asked by wiki @ in Spanish viewed by 235 persons

Change these sentences into questions by inverting the word order. 1. La profesora Cruz prepara la prueba. 2. Sandra y yo necesitamos estudiar. 3. Los chicos practican el vocabulario. 4. …

The phylogenetic distribution of the enzyme rubisco is limited to

Asked by wiki @ in Biology viewed by 206 persons

The phylogenetic distribution of the enzyme rubisco is limited to

A nucleon has the least mass in the nucleus of

Asked by wiki @ in Chemistry viewed by 106 persons

Which of the following is the least massive part of an atom a) nuerons b) protons c) nucleus d) electrons

Most viewed questions in Chemistry


What is the difference between a white and red reaction

Asked by wiki @ in Chemistry viewed by 1575 persons


Convert 8.00 x 10 20 molecules of h2 to moles

Asked by wiki @ in Chemistry viewed by 1498 persons


A vitamin c tablet containing 250 mg of ascorbic acid

Asked by wiki @ in Chemistry viewed by 924 persons



Calculate the molality of a 20 by mass ammonium sulfate

Asked by wiki @ in Chemistry viewed by 825 persons


How many carbon atoms are in 2.12 mol of propane

Asked by wiki @ in Chemistry viewed by 802 persons


Determine the minimum mass of hydrogen gas required to produce

Asked by wiki @ in Chemistry viewed by 756 persons



An oxidation reduction reaction that is also a synthesis reaction

Asked by wiki @ in Chemistry viewed by 713 persons


Which of the following is true about subatomic particles

Asked by wiki @ in Chemistry viewed by 706 persons


Which of the following statements regarding electrical safety is correct

Asked by wiki @ in Chemistry viewed by 669 persons



The mass of 1.21 x10 20 atoms of sulfur is

Asked by wiki @ in Chemistry viewed by 632 persons


Calculate the mass of 3.05 buckets of golf balls answer

Asked by wiki @ in Chemistry viewed by 626 persons


What is the ph of a 1.2 m ch3nh3no3 solution

Asked by wiki @ in Chemistry viewed by 598 persons



A solution that contains 70g of nano3 at 30 c

Asked by wiki @ in Chemistry viewed by 588 persons


What is the electron pair geometry for c in cs2

Asked by wiki @ in Chemistry viewed by 584 persons


What is the uncertainty of a 50 ml graduated cylinder

Asked by wiki @ in Chemistry viewed by 581 persons