chemistry

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of HCl are allowed to react, identify the limiting reagent.

Mg

HCl

MgCl2

H2

QUESTION 8

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 48.6 g of Mg and 150.0 g of HCl are allowed to react, identify the limiting reagent.

Mg

HCl

MgCl2

H2

QUESTION 9

The number of moles of the reagent in excess can be used to calculate the moles of the products of the reaction.

TRUE

FALSE

QUESTION 10

Ammonia gas is formed from nitrogen gas and hydrogen gas according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 112 grams of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 120 grams of ammonia, what is the percent yield of this reaction?

44.1%

66.2%

88.3%

96.4%

QUESTION 11

Ammonia gas is formed from nitrogen gas and hydrogen gas, according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 84.0 g of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 85.0 g of ammonia, what is the percent yield of this reaction?

42.2%

65.0%

70.3%

83.3%

QUESTION 12

Ammonia gas is formed from nitrogen gas and hydrogen gas, according to the following equation, N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 140 grams of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 155 grams of ammonia, what is the percent yield of this reaction?

45.5%

67.0%

82.4%

91.2%
3 points Save Answer
QUESTION 13

The actual yield is usually less than the predicted (theoretical) yield.

TRUE

FALSE
2 points Save Answer
QUESTION 14

The theoretical yield for a chemical reaction can not be calculated until the reaction is completed.

TRUE

FALSE

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  1. Not only do you not get it, you apparently didn't even read how to do the first one.

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