Answer:
D
Step-by-step explanation:
H+ is the hydrogen ion concentration.
This problem requires the use of solving log equation.
PH of vinegar is 2.9, lets find the number of hydrogen ions in it by using the equation:
![PH=-Log[H^{+}]\\2.9=-Log[H^+]\\-2.9=Log_{10}[H^+]](https://tex.z-dn.net/?f=PH%3D-Log%5BH%5E%7B%2B%7D%5D%5C%5C2.9%3D-Log%5BH%5E%2B%5D%5C%5C-2.9%3DLog_%7B10%7D%5BH%5E%2B%5D)
Note: Log is normally base 10 if not specified
Now, to solve, we use exponential to log conversion formula shown below:
Now lets solve:
![-2.9=Log_{10}[H^+]\\H^+=10^{-2.9}\\H^+=0.001259](https://tex.z-dn.net/?f=-2.9%3DLog_%7B10%7D%5BH%5E%2B%5D%5C%5CH%5E%2B%3D10%5E%7B-2.9%7D%5C%5CH%5E%2B%3D0.001259)
Now, the PH of milk is 6.6, so we follow same procedure and find the number of hydrogen ion in milk. Shown below:
![PH=-Log[H^{+}]\\6.6=-Log[H^+]\\-6.6=Log_{10}[H^+]\\H^+=10^{-6.6}\\H^+=0.0000002512](https://tex.z-dn.net/?f=PH%3D-Log%5BH%5E%7B%2B%7D%5D%5C%5C6.6%3D-Log%5BH%5E%2B%5D%5C%5C-6.6%3DLog_%7B10%7D%5BH%5E%2B%5D%5C%5CH%5E%2B%3D10%5E%7B-6.6%7D%5C%5CH%5E%2B%3D0.0000002512)
So, to find how many times it is greater, we divide first answer we found by the second answer:
That is about 5000 times, answer D is right.
Answer:
answer is 12 in all
Step-by-step explanation:
6 plus 4 plus 2 equal 12 so you will have twleve in all
Answer:
Step-by-step explanation:
4*75 = 300 watts ( her light)
a) 2.5*300=750 w/h
b) 365*750 = 273.75 Kw/h
c) (0.12)*273.75 = $32.85
d) 32.85 * 5,000,000 = $164,250,000.00
So basically, so start off, let's explain the term "absolute value".
When you want to find the absolute value of something, such as the number 3 in this question, you just look at the number you have.
In this case, you have the number 3, and you want to find two numbers that have an absolute value of 3.
Absolute value is basically always a positive number that's the same number as you had.
You're looking for 3, and there are two numbers with an absolute value of 3.
The numbers are both -3 and 3 since the absolute value guarantees us that the number (or negative number) is always a positive.
Another example: You want to find the absolute value of 113.
The two numbers that have an absolute value of 113 is -113 and 113. Absolute value guarantees the number is always positive, thus you have your two numbers.
A= b+2
there can b infinite ex.
