Answer:
x = -7 and x = 3
Step-by-step explanation:
x² + 4x - 21 = 0 factors as follows: (x + 7)(x - 3) = 0.
Then x = -7 and x = 3.
Step-by-step explanation:
Since Ca(OH)2 is Basic, we need to find pOH:
pOH = - log [OH-]
pOH = - log(0.0001)
pOH = - ( - 4)
pOH = 4
Since, pH + pOH = 14
Therefore,
pH of 0.0001M sol. of Ca(OH)2 = 10
Answer:
C.) $2.00 per pound
Hope This Helps! Have A Nice Day!
Answer:
x=48
Step-by-step explanation:
What number out of 75 gives you 64%
What number out of 75 gives you 64 out of 100
x 64
------------ = -----------
75 100
Using cross product
100x = 64*75
100x =4800
Divide each side by 100
100x/100 = 4800/100
x=48