a sample contains 8.56×10 raise to 24 molecules of calcium oxide (Cao) how many grams of (Cao) are in the sample?

Question

PLS KINDLY ANSWER MY QUESTION:(

Answer 1

The sample contains 8.56 x 10²⁴ molecues of CaO.

 

1 mol Ca is 40.078 g

1 mol O is 15.999 g

1 mol CaO is 56.077 g

 

1 mol contains about 6.02 x 10²³ molecules

 

Now solve the ratio

 

6.02 x 10²³ = 8.56 x 10²⁴

56.077 g         answer

 

answer = 797.37 g