stoichiometry help?

Question

fill in the blanks

the formula of magnesium oxide is MgO

1)1 mole of magnesium atoms(____grams) and 1 mole of oxygen atoms (____grams) combine to form _____ mole(s) of magnesium oxide (_____grams)

2)12g of magnesium and ____grams of oxygen combine to form ____grams of magnesium oxide

3)when 1.2 grams of magnesium combines with oxygen, the increase in mass is _____grams.

4) if 8 moles of MgO were decomposed to magnesium and oxygen, then we would obtain _____ moles of magnesium and ______ moles of oxygen gas, O2.

Answer 1

1)1 mole of magnesium atoms(__24__grams) and 1 mole of oxygen atoms (__16__grams) combine to form __1__ mole(s) of magnesium oxide (__40__grams)

2)12g of magnesium and __4__grams of oxygen combine to form __20__grams of magnesium oxide

3)when 1.2 grams of magnesium combines with oxygen, the increase in mass is __0.8___grams.

4) if 8 moles of MgO were decomposed to magnesium and oxygen, then we would obtain __8___ moles of magnesium and ___4___ moles of oxygen gas, O2.

Answer 2

do ur hw....if u don't understand....ask ur teacher...because in future when u will get a job...nobody is going to give u the answers!!