Using first the customary ruler and then the metric
ruler, measure the length of the side of the wooden
block. Remember to estimate to one place value
beyond the rulers' gradations.
1 3/32 in inches
y 2.78 cm centimeter
COMPLETE
Calculate ratios for the number of centimeters in
an inch and the number of inches in a centimeter:
cm in or in/cm
1
Hength
DONE

take a better picture and ill do it

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%