A scientist measures the pH level of a solution and finds it to be 3. What is the hydrogen ion concentration in moles per liter? (Use the formula pH = -log[H+])
Mastering Logarithmic Conversions and Applications

Quiz
•
English, Mathematics
•
10th Grade
•
Hard
Anthony Clark
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
0.01 moles per liter
0.001 moles per liter
0.0001 moles per liter
1 mole per liter
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The population of a bacteria culture doubles every 3 hours. If the initial population is 100, how long will it take for the population to reach 800? (Use logarithmic equations to solve)
9 hours
15 hours
6 hours
12 hours
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A sound intensity level is measured at 80 decibels. What is the intensity of the sound in watts per square meter? (Use the formula L = 10 log(I/I0) where I0 = 10^-12)
0.01
0.0001
0.1
0.001
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If log base 2 of x is 5, what is the value of x? (Convert the logarithmic form to exponential form)
32
64
16
8
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A car's value depreciates by 15% each year. If the car is currently worth $20,000, how many years will it take for the value to drop below $10,000? (Use logarithms to find the answer)
10
5
7
3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The Richter scale measures the magnitude of earthquakes logarithmically. If an earthquake measures 6.0 on the Richter scale, how many times more intense is it than one that measures 4.0? (Use properties of logarithms)
200
100
50
10
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A bank offers an interest rate of 5% compounded annually. If you invest $1,000, how long will it take for your investment to double? (Use the formula A = P(1 + r)^t and convert to logarithmic form)
Approximately 14.21 years
20 years
10 years
25 years
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