2 questions of Chem about mol

What is the stoichiometric (molar) ratio of Br-ions to CaBr2?1:34:21:22:1How many moles of H2O are there in 7.15 grams of H2O?  For H2O, use the FW = 18.015 g/mol.0.3970.50710.397 x 1023