Question 4 of 10 What kind of information do unit conversions give?
A. Unit conversions express a number in terms of moles.
B. Unit conversions give the size of one part of something.
C. Unit conversions give an equal amount but with other units.
D. Unit conversions give a fractional part of a number.
SUBMIT

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%

12 is it do you think so

5.6⋅10−^19  j

do you need the explaination?