Answer:
The answer is option 3.
Step-by-step explanation:
You have to substitute H+=2×10^(-9) into the equation of pH :
pH = -log[H+]
H+ = 2×10^(-9)
pH = -log[2×10^-9]
= 8.70 (3s.f)
Answer:
2.3328
Step-by-step explanation:
ANSWER
The correct answer is C
EXPLANATION
We want to find the quotient:

We multiply by the reciprocal of the second fraction:

We cancel out the common factors to obtain:

We multiply to get

This simplifies to :

The correct answer is C