Curious Carl and his lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid. They observed bubbles being produced and did a variety of tests to identify the escaping gas; it proved to be hydrogen. The reaction is represented by the following equation:

Mg + 2HCl → MgCl2 + H2 (g)

What is the mass, in grams, of two moles of HCl?

A) 18.3 g

B) 36.5 g

C) 72.0 g

D) 73.0 g

Question

Keely Lane

Chemistry

17 August, 13:00

Curious Carl and his lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid. They observed bubbles being produced and did a variety of tests to identify the escaping gas; it proved to be hydrogen. The reaction is represented by the following equation:

Mg + 2HCl → MgCl2 + H2 (g)

What is the mass, in grams, of two moles of HCl?

A) 18.3 g

B) 36.5 g

C) 72.0 g

D) 73.0 g

+3

Answers (1)

Know the Answer?

Kali Moss · Answer 1

Given:

Balanced Chemical Equation:

Mg + 2HCl - - > MgCl2 + H2

Volume of HCl = 10 mL

Molar mass of HCl = 36.46 g/mol

The mass, in grams, of two moles HCl is:

2 moles * 36.46 g/mol = 72.92 grams or 73.0 g (letter D)