What is the mass in grams of 5.90 mol C8H18?
To find the mass in grams of 5.90 mol C8H18, we need to first calculate the molar mass of C8H18 (octane).
The molar mass of carbon (C) is 12.01 g/mol.
There are 8 carbon atoms in each molecule of octane, so the total mass of carbon in one molecule of octane is: 8 * 12.01 g/mol = 96.08 g/mol.
The molar mass of hydrogen (H) is 1.01 g/mol.
There are 18 hydrogen atoms in each molecule of octane, so the total mass of hydrogen in one molecule of octane is: 18 * 1.01 g/mol = 18.18 g/mol.
To find the molar mass of octane, we add the mass of carbon and hydrogen: 96.08 g/mol + 18.18 g/mol = 114.26 g/mol.
Now we can calculate the mass in grams of 5.90 mol C8H18:
mass = number of moles * molar mass
mass = 5.90 mol * 114.26 g/mol = 672.074 g.
Therefore, the mass in grams of 5.90 mol C8H18 is 672.074 g.