Question: Post - lab questions Name For the experiment, students verified the molar mass of magnesium metal. However, the same experiment can be performed with an

Post

-

lab questions

Name

For the experiment, students verified the molar mass of magnesium metal. However, the same experiment can be performed with an unknown metal. Complete the following questions to determine the ID of an unknown metal by calculating the molar mass.

An unknown metal was reacted with hydrochloric acid to produce

7.98 m L

of hydrogen gas at

748 m m H g .

If the experiment was performed at

25.0 C,

how many moles of hydrogen gas was produced?

If one mole of hydrogen gas is produced from one mole of the unknown metal, how many moles of unknown metal took place in the reaction?

For the experiment

0.0210 g

of the unknown metal was used to produce hydrogen gas. What is the molar mass of the unknown metal? What is the identity of the unknown metal?

Write a balanced chemical equation for the reaction of the metal from Q

3

with hydrochloric acid. Does the balanced chemical reaction corroborate the stoichiometry mentioned in Q

2 ?

Why or why not?

Post-lab questions Name For the experiment, students verified the molar mass

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