Practice Test

Question 1

The balanced equation shows how sodium chloride reacts with silver nitrate to form sodium nitrate and silver chloride. NaCl plus AgNO sub 3 rightarrow NaNO sub 3 plus AgCl If 4 point 0 0 g of NaCl react with 10 point 0 0 g of AgNO sub 3 , what is the excess reactant?

Revolt · Accepted Answer

C: NaCl

Question 2

Shown below is a chemical reaction. Fe plus CuCl sub 2 rightarrow FeCl sub 2 plus Cu Which pair of substances are the products?

Revolt · Accepted Answer

D: FeCl sub 2  and   Cu

Question 3

What is the percent by mass of water in cap n A sub 2 cap s times cap o sub 4 times 10 cap h sub 2 cap o ? Use percent Element is equal to total mass of element in compound over molar mass of compound times 100

Revolt · Accepted Answer

C: 55 point 9 2 percent

Question 4

The equation represents the combustion of sucrose. cap c sub 12 cap h sub 22 cap o sub 11 plus 12 cap o sub 2 rightarrow 12 CO sub 2 plus 11 cap h sub 2 cap o If there are 10 point 0 g of sucrose and 8 point 0 g of oxygen, how many moles of sucrose are available for this reaction?

Revolt · Accepted Answer

A: 0 point 0 2 9  mol

Question 5

This formula equation is unbalanced. BaCl sub 2 times aq plus Na sub 2 CO sub 3 aq rightarrow BaCO sub 3 times s plus NaCl times aq Which coefficient should be placed in front of NaCl to balance this equation?

Revolt · Accepted Answer

B: 2

Question 6

Sodium combines with water to produce sodium hydroxide and hydrogen gas. Which word equation represents this violent reaction?

Revolt · Accepted Answer

B: sodium plus water rightarrow sodium hydroxide plus hydrogen

Question 7

Iron reacts with oxygen to form iron oxide (rust) . Which best describes this statement?

Revolt · Accepted Answer

A: Iron oxide is formed by rearranging atoms.

Question 8

What is the empirical formula for propene open paren cap c sub 3 cap h sub 6 close paren ?

Revolt · Accepted Answer

C: cap c cap h sub 2

Question 9

If a substance reacts with oxygen, the chemical reaction is most likely a

Revolt · Accepted Answer

D: combustion reaction.

Question 10

Propane burns in air to produce carbon dioxide and water. What is this type of chemical reaction called?

Revolt · Accepted Answer

D: combustion

Practice Test Answers

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