Question

Please help don’t understand this I attached the question

Answer 1

When you take the molar mass of the elements and add them all together you get 58.32g/mol

Answer 2

58.32

Step-by-step explanation:

The mass number is one mole and for Mg it is 24.306 for O it is 15.999 and for H it is 1.008. because O and H have 2, you multiply them by 2 and add all the numbers and it equals 58.32