Use the pH scale to answer the question.What is the pH of a solution with a hydrogen ion concentration of 10-9 mole per liter? Is this solution an acid or a base?
A. pH = 9; base
B. pH = 3; acid
C. pH = 7; neutral
D. pH = 10; base
Answer: A
Mathematics
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Perform the indicated operation. Simplify the answer when possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Solve the Problems.
Three hard drives have a storage capacity of 1100 gigabytes. The largest hard drive stores twice as much as the smallest and the other stores 100 gigabytes more than the smallest. What are the storage capacities of the largest hard drive?
Mathematics
Solve and check.-29 = n - 5
A. n = 34 B. n = -24 C. n = 24 D. n = -34
Mathematics
Perform the operation and simplify, or solve the equation for the variable.
÷ 
A. 
B. 
C. 
D. 
Mathematics