Hey quik time from u but need help on dis: Which individual elements make up the following common compounds? CaCO3

CaCl2

C3H6O

HCl

Ca(OH)2

WILL MARK BRAINLIEST. means alot to me for dis <3 oh yeh its for 8th grade srry. didnt see dat setting

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%

so what is the problem with your lab report and whats the subject of the lab report? i will you

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a