If the amount of dark matter and energy is above the critical level, what will happen to the fate of the universe? the universe will expand at an accelerated rate. the expansion of the universe will stop, and its volume will remain the same. the universe will stop expanding and collapse in a big crunch. the expansion of the universe will slow but continue.

I believe it is;  The universe will stop expanding and collapse in a big crunch.

I may be wrong though so double check on that.

Explanation:

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