Answer:
212.85
Step-by-step explanation:
55% = = 0.55
55% of 387 = 0.55 × 387 = 212.85
Answer:
1/2
Step-by-step explanation:
POH is the -log [ OH- ]. Using this equation, simply find the -log of the OH- concentration to find the pOH:
pOH = - log ( 0.000086 ) = 4.07
For this case we must factor the following expression:
We take the sign "-" as a common factor of the expression, taking into account that:
To factor, we must find two numbers that, when multiplied, result in -48 and when added, result in -2. These numbers are -8 and +6.
Then, we factor the expression within the parenthesis as:
Answer: