Hydrogen + oxygen yields water

Question

-Label what type of reaction (synthesis, decomposition, single replacement, double replacement or combustion)
-Write the balanced chemical equation
-How much water could you get if you started with 250.0 grams of hydrogen?
-How much water could you get if you started with 250.0 grams of oxygen?
Which is the limiting reactant?

Answer 1

-Type of reaction: synthesis
-Balanced chemical equation: 2H2 + O2 → 2H2O
-Using stoichiometry, 250.0 g of hydrogen would produce 222.2 g of water (or 0.28 moles of hydrogen = 0.56 moles of water)
-Using stoichiometry, 250.0 g of oxygen would produce 625.0 g of water (or 0.49 moles of oxygen = 0.98 moles of water)
The limiting reactant would be the one that produces less water, which is hydrogen in this case.