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Use the following balanced reaction to solve 1-3:
P4 (s) + 6H2 (g) → 4PH3 (g)


1. How many grams of Hydrogen gas (H2) will be needed to react with 20 grams of P4?

Respuesta :

Answer:

1.96g H2

Explanation:

P4 = 123.9g/mol

H2 = 2.02g/mol

[tex]\frac{20g P_{4} }{1}[/tex] * [tex]\frac{1 mol P_{4} }{123.9g}[/tex] * [tex]\frac{6 mol H_{2} }{1 mol P_{4} }[/tex] * [tex]\frac{2.02g H_{2} }{1 mol H_{2} }[/tex] = 1.96g H2

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