If every gram of salt is 20.9% chlorine, how much is required to make a 220 ppm chlorine solution with 350 grams of water?

The amount of salt required is 0.3685 grams.

Step-by-step explanation:

20.9% of 1 gram of salt is chlorine, which means the grams of chlorine in 1 gram of salt are

Now, to make 220 ppm solution, it must be that

where is the grams of chlorine required.

We rearrange the equation and solve for

since 1 gram of salt has 0.209 grams of chlorine, 0.07702g of chlorine corresponds to

Thus the amount of salt required is 0.3685 grams.

b

step-by-step explanation:

the word superfluous means unnecessary

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8