©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
LUOA chemistry semester Exam Review
Questions With Correct Answers
At the shooting range, a man hits the center of the target three times in a row. Is this accurate,
precise, or both? - answer✔accurate and precise
A student calculates the volume of a graduated cylinder at 43.26 ml. The actual volume is 42.32
ml. What is the percent error? Show your work below. Round your answer to two digits.
percent error= |error|/ actual value (100%)
error= measured value - actual value - answer✔percent error= |error|/ actual value (100%)
error= measured value - actual value
43.26- 42.32= 0.94 ml
error= 0.94
percent error = |0.94|/ 42.32 (100%)
percent error= 2.2 %
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
Indicate the number of significant figures in the measured number 0.0020 - answer✔2
subtract using significant figures:
952.7-140.7389
936.9 - 125.001
22.3505 + 3.90
23.0002 + 3.1 - answer✔812.0
811.9
26.25
26.1
Solve the following math problem and report your answer using the correct number of significant
figures.
2.614/ 12.4 - answer✔0.210
Solve the following math problem and report your answer using the correct number of significant
figures.
1.81/ 2.1132 - answer✔0.857
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
Divide the following:
( 7.8 × 10^3 ) ÷ ( 1.2 × 10^4 )
Remember to insert commas and decimals as needed. - answer✔6.5x10 ^ -1
Multiply the following:
( 6.2 × 10^3 ) × ( 5.8 × 10^-4 )
Remember to insert commas and decimals as needed. - answer✔3.596
Multiply the following:
( 4.3 × 10^8 ) × ( 2.8 × 10^2 ) .
Remember to insert commas and decimals as needed. - answer✔1.2 x 10^11
Write the following number in scientific notation: 56,000,000 - answer✔5.6 x 10^7
Convert: 8700 mL = _____ L - answer✔8.7 L
Convert: 60 mg = ____ g - answer✔0.06
12/3/2024 11:27AM
LUOA chemistry semester Exam Review
Questions With Correct Answers
At the shooting range, a man hits the center of the target three times in a row. Is this accurate,
precise, or both? - answer✔accurate and precise
A student calculates the volume of a graduated cylinder at 43.26 ml. The actual volume is 42.32
ml. What is the percent error? Show your work below. Round your answer to two digits.
percent error= |error|/ actual value (100%)
error= measured value - actual value - answer✔percent error= |error|/ actual value (100%)
error= measured value - actual value
43.26- 42.32= 0.94 ml
error= 0.94
percent error = |0.94|/ 42.32 (100%)
percent error= 2.2 %
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
Indicate the number of significant figures in the measured number 0.0020 - answer✔2
subtract using significant figures:
952.7-140.7389
936.9 - 125.001
22.3505 + 3.90
23.0002 + 3.1 - answer✔812.0
811.9
26.25
26.1
Solve the following math problem and report your answer using the correct number of significant
figures.
2.614/ 12.4 - answer✔0.210
Solve the following math problem and report your answer using the correct number of significant
figures.
1.81/ 2.1132 - answer✔0.857
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
Divide the following:
( 7.8 × 10^3 ) ÷ ( 1.2 × 10^4 )
Remember to insert commas and decimals as needed. - answer✔6.5x10 ^ -1
Multiply the following:
( 6.2 × 10^3 ) × ( 5.8 × 10^-4 )
Remember to insert commas and decimals as needed. - answer✔3.596
Multiply the following:
( 4.3 × 10^8 ) × ( 2.8 × 10^2 ) .
Remember to insert commas and decimals as needed. - answer✔1.2 x 10^11
Write the following number in scientific notation: 56,000,000 - answer✔5.6 x 10^7
Convert: 8700 mL = _____ L - answer✔8.7 L
Convert: 60 mg = ____ g - answer✔0.06
