How do you find the moler mass of a compound like H2O?

you need a periodic table of elements.

in the periodic table, you can find certain properties of elements and and also atomic number and atomic mass.
since in the problem, we are required to calculate for molar mass of H2O, you look for H and O in the periodic table and get each atomic mass. for H, it's approximately 1 and for O it's approximately 16,,
to get mass, multiply the number of each element by atomic mass, since there are 2 H's and 1 O:
2*1 + 1*16 = 2 + 16 = 18 g/mole

hope this helps~ :)

Helps a bunch thank you.

To find the molar mass of a compound like H2O, you need to know the atomic masses of the elements in the compound. Here's how you can calculate it:

1. Start by finding the atomic masses of each element in the compound. The atomic mass of hydrogen (H) is approximately 1 gram per mole (g/mol), and the atomic mass of oxygen (O) is approximately 16 g/mol.

2. Next, determine the number of atoms of each element in the compound. In H2O, there are two hydrogen atoms and one oxygen atom.

3. Multiply the atomic mass of each element by the number of atoms present. For hydrogen, the calculation would be 2 (number of atoms) multiplied by 1 g/mol (atomic mass), which is equal to 2 g/mol. For oxygen, the calculation would be 1 (number of atoms) multiplied by 16 g/mol (atomic mass), which is also equal to 16 g/mol.

4. Add up the results from step 3 to obtain the molar mass of the compound. In this case, 2 g/mol (hydrogen) + 16 g/mol (oxygen) equals 18 g/mol.

Therefore, the molar mass of H2O, or water, is 18 grams per mole.