What is the mass in grams of 1.355 mol Ca

the molar mass of the components making up Ca(NO₃)₂ are as follows;

Ca - 40 g/mol

N - 14 g/mol

O - 16 g/mol

the molar mass of the compound is calculated as follows;

Ca(NO₃)₂ --> 40 + 2(14 + 16x3)

              = 164 g/mol

1 mol of the compound weighs 164 g

Therefore 0.433 mol = 164 g/mol x 0.433 mol

                                = 71.0g

the mass of 0.433 mol of the compound is 71.0 g

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.