a)What is the ratio of hydrogen atoms (H) to oxygen atoms (O) in 2 L of water? Enter the simplest whole number ratio in order of hydrogen to oxygen, respectively.
Express your answer as two integers, separated by a comma (e.g., 3,4).
b) How many atoms of hydrogen (H) are present in 200 molecules of ammonia (NH3)?
Express your answer numerically.
c) Magnesium oxide decomposes into magnesium and oxygen. If 4.03g of magnesium oxide decomposes to form 2.43g of magnesium, what mass of oxygen gas is also released in the reaction?
Express the mass of oxygen numerically in grams.
Please show each and every step and explain why you did what.