Question

How many grams of Cl are in 575g CaCl2

Answer 1

Ca=40 Cl=35
Mass of 1 mole of CaCl2=40+70=110g

In 110g of CaCl2,there are 70 gms Cl

So in 575 g of CaCl2,there will be----(70/110)*575 g of Cl.

Solve and get the answer:-)

Answer 2

Ca=40 Cl=35.5

molar mass of CaCl2=40+(35.5*2)=111g /mol

In 111 g of CaCl2, there are 71 g Cl

So in 575 g of CaCl2,there will be  (71*575)/111 g=367.79 g

                                     1 mole of compound contains avogadro no of molecules.According to avogadro's law, at the same temperature and pressure equal volumes of all gases have the same number of molecules. For an ideal gas of given mass, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure remains constant.