What is the mass in grams of 5.90 mol c8h18?

To find the mass in grams of 5.90 mol of C8H18 (octane), we need to first calculate the molar mass of C8H18.

The molar mass of C is approximately 12.01 g/mol and H is approximately 1.01 g/mol.

Molar mass of C8H18 = (8 x 12.01) + (18 x 1.01) = 96.08 + 18.18 = 114.26 g/mol

Now, to find the mass in grams of 5.90 mol of C8H18: Mass = 5.90 mol x 114.26 g/mol = 673.59 g

Therefore, the mass in grams of 5.90 mol of C8H18 is 673.59 grams.