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2 years ago

How many moles of hydrogen are produced from 57.5 grams of lithium?

Chemistry

1 answer:

melomori [17]2 years ago

8 0

The moles of hydrogen which are produced from 57.5 grams of lithium is 8.21 grams.

<h3>What is stoichiometry?</h3>

Stoichiometry of the reaction gives idea about the relative amount of product produced by the reactant in terms of moles.

Given chemical reaction is:

2Li(s) + H₂O(l) → 2LiOH(aq) + H₂(g)

Moles of lithium will be calculated as:

n = W/M, where

W = given mass = 57.5g
M = molar mass = 7g/mol

n = 57.5 / 7 = 8.21 mol

From the stoichiometry of the reaction:

2 moles of Li = produces 1 mole of H₂
8.21 moles of Li = produces 8.21/2=4.105 moles of H₂

Mass of H₂ = (4.105mol)(2g/mol) = 8.21g

Hence required mass of hydrogen gas is 8.21g.

To know more about mass & moles, visit the below link:

brainly.com/question/20563088

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