Module 12-Lesson 3_Gas Stoichiometry

Science

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7 questions

mohamedhashem668

•over 4 years ago

Question 1

Multiple Choice

10 points

................................................is the number written in front of a reactant or product in a chemical equation, which tells the smallest number of particles of the substance involved in the reaction .

A.Subscript

B.Coefficient

C.ratio

D.chemical reaction

Question 2

Multiple Choice

10 points

Coefficients in chemical equations represent ....................................of substances in the reaction

A.balancing

B.molar mass

C.molar amounts

Question 3

Multiple Choice

10 points

2H2(g) + O2(g) → 2H2O(g) in the above balanced chemical reaction . What Does 2 in front of hydrogen represent ?

A.The number of moles of hydrogen

B.The volume of hydrogen

C.Both the number of moles and volume of hydrogen

D.The number of atoms of hydrogen

Question 4

Multiple Choice

10 points

To find the volume of a gaseous reactant or product in a reaction, you must know .............................................. and ............................of at least one other gas involved in the reaction.

A.the balanced equation for the reaction and the volume

B.the mass of the reactant and the mass of the product

C.the pressure and the temperature

D.the volume and the number of moles

Question 5

Multiple Choice

10 points

How many liters of propane gas (C3H8) will undergo complete combustion with 34.0 L of oxygen gas?

A.12.2 L C3H8

B.6.8 L C3H8

C.3.9 L C3H8

D.17.5 L C3H8

Question 6

Multiple Choice

10 points

Determine the volume of hydrogen gas needed to react completely with 5.00 L of oxygen gas to form water.

A.16.8 L H2

B.15 L H2

C.10 L H2

D.2.34 L H2

Question 7

Multiple Choice

10 points

CHALLENGE Nitrogen and oxygen gases react to form dinitrogen monoxide gas (N2O). What volume of O2 is needed to produce 34 L of N2O?

A.29.09 L O2

B.13.4 L O2

C.12 L O2

D.17 L O2