How many moles are represented by 16.0g of ethanol, C2H5OH?
See your last question and my response.
To determine the number of moles represented by 16.0g of ethanol (C2H5OH), we need to use the molar mass of ethanol. The molar mass is the mass of one mole of a substance and can be calculated by summing up the atomic masses of all the atoms in the chemical formula.
Here is the step-by-step process:
1. Write down the chemical formula for ethanol: C2H5OH.
2. Determine the atomic masses of each element from the periodic table:
- Carbon (C) = 12.01 g/mol
- Hydrogen (H) = 1.008 g/mol
- Oxygen (O) = 16.00 g/mol
3. Multiply the atomic masses by the corresponding subscripts in the chemical formula and sum them up:
(2 x Atomic mass of Carbon) + (6 x Atomic mass of Hydrogen) + Atomic mass of Oxygen
(2 x 12.01 g/mol) + (6 x 1.008 g/mol) + 16.00 g/mol = 46.07 g/mol
4. The molar mass of ethanol is calculated as 46.07 g/mol.
5. Now, divide the given mass (16.0g) by the molar mass of ethanol (46.07 g/mol) to find the number of moles:
Moles = Mass / Molar mass
= 16.0g / 46.07 g/mol
Using a calculator, divide 16.0 by 46.07, which gives approximately 0.347 moles of ethanol.
Therefore, 16.0g of ethanol (C2H5OH) is equivalent to approximately 0.347 moles.