The stoichiometry problems are worked the same way. Just like yur NG problem.
Step 1. Write and balance the equation.
Step 2. Convert grams of what you have to mols. mols = grams/molar mass if solid or M x L = mols if liquid.
Step 3. Convert mols of what you have to mols of what you want.
Step 4. Convert mols of what you want (from step 3) to grams. g = mols x molar mass.
How many grams of NH3 are required to make 52.7g H2O in the following reaction : 4NH3+6NO->5N2+6H2O
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