Homework Help: Chemistry!

Posted by Jessica on Tuesday, November 13, 2007 at 3:30pm.

Nitrogen reacts with hydrogen to make ammonia: N2 + 3H2 -> 2NH3

Calculate the maximum thoeretical yield of ammonia that can be made by reacting 90g of hyrdrogen with an excess of nitrogen.

Thanks!

Chemistry! - DrBob222, Tuesday, November 13, 2007 at 3:39pm
Write the equation and balance it.

Convert 90 g H2 to mols. mols = g/molar mass.

Convert mols H2 to mols NH3 by using the coefficients in the balanced equation.

Convert mols NH3 to grams NH3.
g NH3 = mols NH3 x molar mass NH3. That is the theoretical yield.

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