Question

What is the mass in grams of 1.355 mol Ca

Answer 1

To calculate the mass in grams of 1.355 mol of calcium, multiply the moles by the molar mass of calcium (40.08 g/mol), resulting in approximately 54.31 grams.

Step-by-step explanation:

To calculate the mass in grams of 1.355 mol of elemental calcium (Ca), we use the molar mass of calcium. The molar mass of calcium is approximately 40.08 g/mol. Therefore, to find the mass in grams of 1.355 mol Ca, we would multiply the number of moles by the molar mass of calcium:

Mass = number of moles × molar mass

Mass = 1.355 mol × 40.08 g/mol

Mass = 54.3084 g

The mass in grams of 1.355 mol of calcium is approximately 54.31 grams.

Answer 2

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