Among water, ethanol and isopropanol,

which has the largest molar mass.

What are the formulas for each? Can you do it from those?

isopropanol

To determine which of water, ethanol, and isopropanol has the largest molar mass, we need to know the chemical formulas and molar masses of each compound.

The chemical formula for water is H2O, meaning it consists of two hydrogen (H) atoms and one oxygen (O) atom.

The molar mass of hydrogen (H) is approximately 1 gram per mole, and the molar mass of oxygen (O) is approximately 16 grams per mole. Therefore, the molar mass of water (H2O) is:

2(1 gram/mol) + 1(16 grams/mol) = 18 grams/mol.

The chemical formula for ethanol is C2H5OH, meaning it consists of two carbon (C) atoms, six hydrogen (H) atoms, and one oxygen (O) atom.

The molar mass of carbon (C) is approximately 12 grams per mole, the molar mass of hydrogen (H) is approximately 1 gram per mole, and the molar mass of oxygen (O) is approximately 16 grams per mole. Therefore, the molar mass of ethanol (C2H5OH) is:

2(12 grams/mol) + 6(1 gram/mol) + 1(16 grams/mol) = 46 grams/mol.

The chemical formula for isopropanol is C3H8O, meaning it consists of three carbon (C) atoms, eight hydrogen (H) atoms, and one oxygen (O) atom.

Using the same molar masses for carbon (C), hydrogen (H), and oxygen (O) as before, the molar mass of isopropanol (C3H8O) is:

3(12 grams/mol) + 8(1 gram/mol) + 1(16 grams/mol) = 60 grams/mol.

Comparing the molar masses, we can see that isopropanol (C3H8O) has the largest molar mass of 60 grams/mol. Therefore, among water, ethanol, and isopropanol, isopropanol has the largest molar mass.