Determine the mass of oxygen in 18.54 g of the organic compound, C4H10O.

Sure, here are the steps to determine the mass of oxygen in 18.54 g of the organic compound, C4H10O:

1. First, we need to calculate the molar mass of C4H10O. The molar mass of carbon (C) is approximately 12.01 g/mol, hydrogen (H) is approximately 1.01 g/mol, and oxygen (O) is approximately 16.00 g/mol.

2. Multiply the molar mass of each element by the number of atoms of that element in the compound:

   • Carbon: 12.01 g/mol x 4 = 48.04 g/mol
   • Hydrogen: 1.01 g/mol x 10 = 10.10 g/mol
   • Oxygen: 16.00 g/mol x 1 = 16.00 g/mol

3. Add these values together to get the molar mass of C4H10O:

   • 48.04 g/mol + 10.10 g/mol + 16.00 g/mol = 74.14 g/mol

4. Now, we need to find out what fraction of this molar mass is due to oxygen. To do this, divide the molar mass of oxygen by the molar mass of the compound:

   • 16.00 g/mol ÷ 74.14 g/mol = 0.2158 (or 21.58%)

5. Finally, to find the mass of oxygen in 18.54 g of the compound, multiply the total mass of the compound by the fraction of the mass that is due to oxygen:

   • 18.54 g x 0.2158 = 4.00 g

So, the mass of oxygen in 18.54 g of C4H10O is approximately 4.00 g.