Difluoromethane has the formula ch2f2- this compound can be classified as

a.) covalent, because it contains carbon and hydrogen
b.) ionic, because it contains fluorine ions
c.) covalent because it contains only nonmetal
d.)ionic, because it contains both hydrogen (a metal )and nonmetals

The answer is C because it is between nonmetals

the answer is definitely c.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%