Chapter 9 Chemistry

1) Which quantity is equal to one mole of Si? the atomic mass in grams

Which of the following quantities is equivalent to Avogadro’s number? the number of atoms in 16.00 g of O-16

The molar mass of a compound is the sum of the atomic masses of its atoms

What is the formula of calcium chloride hexahydrate? CaCl2 ・6H2O

Given the balanced equation: 4NH3 + 5O2 → 4NO + 6H2O What is the number of moles of H2O formed when 2.0 moles of NH3 react completely? 3.0 mol

Given the balanced equation:
N2 + 3H2 → 2NH3
What is the number of moles of ammonia
formed from the reaction of 10. moles of
hydrogen with excess nitrogen? 6.7 mol

Given the balanced equation: 2H2 + O2 → 2H2O Which mass of oxygen completely reacts with
4.0 grams of hydrogen to produce 36.0 grams of water? 32.0 g

What is the number of moles of 150 grams of potassium phosphate? 0.71 mol