Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction. NH4NO3(s)—>N2O(g) + 2H2O(l)

Q:How many grams of NH4NO3 are required to produce 33.0 g N20?

your picture is not part of the scientific method.

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i think it is true since you can test the answer and can use observations to complete it.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error