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
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