safiyyahrahman6907

29.04.2021 • 

Chemistry

The molar mass of gallium (\ce{Ga}GaG, a) is \pu{69.72 g/mol}69.72 g/mol69, point, 72, space, g, slash, m, o, l. Calculate the number of atoms in a \pu{27.2 mg}27.2 mg27, point, 2, space, m, g sample of \ce{Ga}GaG, a.
Write your answer in scientific notation using three significant figures.
\text{atoms Ga}atoms Gastart text, a, t, o, m, s, space, G, a, end text

Ответ:

tohanab

29.05.2020

Chemistry

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0.95mole

Explanation:

The balanced equation: 2 NH4ClO4 → N2 + Cl2 + 2 O2 + 4 H2O So: 2 mol of NH4ClO4 produces 4 mol of water X mol of NH4ClO4 produces 1.9 mol of water Solving the proportion: X = (1.9 ∙ 2) / 4 = 0.95 mol 0.95 mole

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