X0 134 6
y019 16 36
Which equation represents the relationship between x and y in the table?
A. y=x?
B. y = x
OC y = 4x - 3
D. y = (x + 1)2

A . y  = x²

Explanation:

The equation that represents the relationship between x and y in the table is that of A which is y  = x².

As we can see from the table, at every instance of x, y is always a square of this variable.

If x  = 0, y  = 0² = 0

  x  = 1, y  = 1²   = 1

  x  = 2, y = 2²  = 4

So y  = x²

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%