Regulations on air pollutants in the united states and other countries since the 1970s have greatly reduced the amount of co2 emissions. true false

True.

Because some people breathe less pollution and face lower risks of premature death and other serious health

Its false it increased by 75% in the 70s hope i helped

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

24

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)