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Answer the following questions.

1. You have a chemical in a sealed glass container filled with air. The system has a mass of 250.0 g. The chemical is ignited by means of a magnifying glass focusing sunlight on the reactant. After the chemical is completely burned, what is the mass of the system?

2. Check the following reactions if it conforms with the Law of Conservation of Mass.
a. N2O5(g) → N204(g) + O2(g)
b. 2Mg(s) + O2(g) → 2MgO(s)
c. H3PO4(aq) + 3NH3(aq) → (NH4)3PO4(aq)

3. Identify the reactants and products in no. 2.​


Sagot :