4)  the mixtures of sodium carbonate and calcium nitrate react to precipitate calcium carbonate and sodium nitrate. this reaction is shown by which balanced chemical equation? 4)  the mixtures of sodium carbonate and calcium nitrate react to precipitate calcium carbonate and sodium nitrate. this reaction is shown by which ba. lanced chemical equation?

The reaction between Na2CO3 and Ca(NO3)2 to precipitate CaCO3 and NaNO3 is shown by balanced double diaplacement reaction.

lol for the pointsss

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