The chemical industry is periodically checked to ensure that it does not exceed the maximum permissible concentrations of substances dangerous to human health. This limit represents the concentration that, according to present knowledge, will not affect the health of an employee who is exposed to the substance over long periods of time. Which of the following statements will most likely apply in the future? The maximum permissible concentrations will (1) increase
(2) decrease
(3) remain the same
(4) depend on knowledge available at that time
(5) not be regulated

Please some help answer ​

i believe the answer is true.

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