Ineed i need to study for test
2. the picture below shows a light ray striking a mirror and
bouncing off. use the picture to answer the questions below.
a. what is a called?

b. what is b called?

c. what is c called?

d. if a measures 30 degrees, what is the measurement of c?

answer:

hecc

explanation:

there is no photo attatched

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%