Unit 8 Test: Stoichiometry

Match each vocabulary term to its definition.

• stoichiometry

• __ is the study of the numerical relationships between products and reactants in a chemical

  reaction.

• theoretical yield

• The __ is the maximum amount of product that can be produced from a given amount of reactant.

• mole ratio

• The __ of a chemical reaction is the amount of product produced by the reaction in reality.

• percent yield

• A(n) __ is a ratio between the number of moles of any two substances in a balanced chemical equation.

• actual yield

• The __ of a reaction gives the ratio of the actual yield to the theoretical yield.

Tags

NGSS.HS-PS1-7

Shoichiometry is based on the law of conservation of (a)   .

• charge

• volume

• reactants

• mass

Tags

NGSS.HS-PS1-7

In a balanced chemical equation, the numbers of individual particles and the numbers of moles of particles are represented by the (a)   .

• chemical symbols

• coefficients

• subscripts

• molar masses

Mole ratios for a reaction are obtained from the (a)   .

• balanced chemical equation

• total mass of products

• periodic table

• molar masses

In the decomposition reaction of compound AB into substances A and B, what is the number of mole ratios that can be formed?

(a)  

• 3

• 9

• 6
• 1

Tags

NGSS.HS-PS1-7

Calculating the mass of a reactant from the coefficient in a chemical equation is an example of a __.

(a)  

• mass-to-mass conversion

• mole-to-mole conversion

• mass-to-mole conversion

• mole-to-mass conversion

Percent yield of a product is a measure of a reaction’s (a)   .

• heat production
• spontaneity
• rate
• efficiency

The actual yield of a product is __.

(a)  

• independent of the reactants

• the same as its theoretical yield
• a negative value

• measured experimentally

Tags

NGSS.HS-PS1-7

How many molecules of carbon dioxide are represented by the equation?

(a)  

• 16
• 8

• 12

• 20

• 2
• 44.01
• 6.02x10^23

Tags

NGSS.MS-PS1-5

How many moles of octane are represented by the equation?

(a)  

• 2
• 5
• 16
• 18
• 6.02x10^23
• 114.23