Question

The proportion of dissolved substances in seawater is usually expressed in

A. parts per hundred.
B. parts per thousand.
C. parts per ten thousand.
D. parts per million.

I'm not sure if it's b or d, please explain

Answer 1

It's D Parts per million

Answer 2

Salutations!

The proportion of dissolved substances in seawater is usually expressed in ----

The proportion of dissolved substances in seawater is usually expressed in parts per thousand. Parts per thousand can also be called as salinity. Its expressed as parts per thousand because the proportion of dissolved substances in seawater is very limited.

Thus, your answer is option B.

Hope I helped :D