What is the pOH of a solution with [OH'] = 9,0 x 10-7? O A. 7.95
O B. -7.00
C. 9.54
D. 6.04
SUBMIT
Help pls

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?