Each year, the Department of Water Works measures the chloride concentration level in the water. The first year, they found the chloride concentration changed by −135 mg/L . It is estimated that the chloride concentration will change −2115 mg/L the next year. What is the total change that will likely occur in 2 years?

Complete question :

Each year, the Department of Water Works measures the chloride concentration level in the water. The first year, they found the chloride concentration changed by −1 3/5 mg/L . It is estimated that the chloride concentration will change −2 1 /15 mg/L the next year. What is the total change that will likely occur in 2 years?

- 3 2/3 mg/L

Step-by-step explanation:

Given that:

Change in concentration during first year = - 1 3/5 mg/L

Estimated change in second year = - 2 1/15 mg/L

Total change in concentration likely to occur over the 2 years:

This will be the sum of the concentration in the first and second year:

[-1 3/5 + (-2 1/15)] mg/L

-1 3/5 - 2 1 /15

-8 / 5 - 31 /15

L. C. M of 5 and 15 = 15

(-24 - 31) / 15

= - 55 / 15

= - 3 10/15

= - 3 2/3 mg/L

168

step-by-step explanation:

i am pretty sure that the answer is 168

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.