I will mark you brainlist please help answer and explain how did u do that
[ lesson : molarity]

20) How many grams of CaCI2 would be dissolved in 1.0 L of a 0.10 M solution of CaCI2?

21) How many grams of CaCl2 should be dissolved in 500.0 mL of water to make a 0.20M solution of CaCl2?

22) What mass of NaOH is on
250 mL of a 3.0M NaOH solution?

58750.08068 is the answer i think

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o