Which of these are found in eukaryotic cells? 1. nucleoid
2. vacuole
3. mitochondria
4. Golgi apparatus
O A. 1, 3, 4
O B. 1, 2,4
O C. 2, 3, 4
O D. 1, 2, 3

C

Explanation:

nucleoid is prokaryotic

mitochondria is found in eukaryotic cells.

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%