Question

lithium nitride reacts with water to produce ammonia and lithium hydroxide, Li3N + 3H20 -> NH3 + 3LiOHa. how many grams of Li3N will react with 40 g of h2o?b. what mass of lithium hydroxide is produced from 6.75 mol of lithium nitride?

Answer 1

a)

Step 1

The reaction provided:

Li3N + 3H20 => NH3 + 3LiOH (completed and balanced)

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Step 2

Information provided:

40 g of H2O

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Information needed:

The molar mass of Li3N = 34.9 g/mol approx.

The molar mass of H2O = 18.0 g/mol approx.

(please, use your periodic table)

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Step 3

By stoichiometry,

Procedure:

Li3N + 3H20 => NH3 + 3LiOH

34.9 g L3N --------------- 3 x 18.0 g H2O

X --------------- 40 g H2O

X = (40 g H2O x 34.9 g L3N)/(3 x 18 g H2O)

X = 25.9 g

Answer: 25.9 g of L3N will react with H2O