General Chemistry I: Mathematics Reassessment

IntoChemistry | General Chemistry I Math Readiness

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Readiness reassessment

After targeted review, use these 24 different questions to check progress on the same six math skills.

Suggested: review any skill area below 75%; this cutoff is an instructional choice, not a validated prediction threshold. Scores are not automatically sent to Talon.

Choose one response for each question, then select “Check my answers.” No timer. Hints are optional. You can retry freely. Questions are formative, not proctored.

Question 1. What percentage of a mixture is 4 g of solute in 20 g of total mixture?

0.2 % 20.0 % 80.0 % 25.0 %

Hint for question 1

Use the whole mixture as denominator.

Question 2. What percentage of a mixture is 5 g of solute in 25 g of total mixture?

0.2 % 20.0 % 80.0 % 25.0 %

Hint for question 2

Use the whole mixture as denominator.

Question 3. Which is the correct scientific notation for 0.072?

7.2 × 10^-1 7.2 × 10^2 72 × 10^-2 7.2 × 10^-2

Hint for question 3

A number smaller than one requires a negative power of ten.

Question 4. Which is the correct scientific notation for 8.4e-06?

84 × 10^-6 8.4 × 10^-5 8.4 × 10^-6 8.4 × 10^6

Hint for question 4

A number smaller than one requires a negative power of ten.

Question 5. How many significant figures are in the measured value 0.00060?

2 3 1 4

Hint for question 5

Focus on zeros that mark position versus recorded precision.

Question 6. How many significant figures are in the measured value 23.00?

3 4 1 2

Hint for question 6

Focus on zeros that mark position versus recorded precision.

Question 7. Convert 720 mg to grams.

0.72 g 0.072 g 7.2 g 720 g

Hint for question 7

One gram is one thousand milligrams.

Question 8. Convert 45 mg to grams.

0.045 g 45 g 0.0045 g 0.45 g

Hint for question 8

One gram is one thousand milligrams.

Question 9. Given y = 4x + 3, solve for x when y = 27.

7 5 8 6

Hint for question 9

Subtract the constant term before dividing.

Question 10. Given y = 5x + 4, solve for x when y = 19.

2 3 5 4

Hint for question 10

Subtract the constant term before dividing.

Question 11. What is the slope of the line through (0 mL, 0 g) and (4 mL, 10 g)?

5.00 g/mL 2.50 g/mL 1.25 g/mL 3.50 g/mL

Hint for question 11

Slope is rise divided by run.

Question 12. What is the slope of the line through (0 mL, 0 g) and (5 mL, 20 g)?

4.00 g/mL 8.00 g/mL 2.00 g/mL 5.00 g/mL

Hint for question 12

Slope is rise divided by run.

Question 13. What fraction is equivalent to 35%?

7/20 7/10 3/5 3/20

Hint for question 13

A percent means per one hundred.

Question 14. A sample increases from 40 g to 50 g. What is percent increase relative to the initial mass?

20% 25% 10% 125%

Hint for question 14

Percent change uses initial value in the denominator.

Question 15. Which is equivalent to 4.5 × 10⁻²?

0.045 450 0.0045 0.45

Hint for question 15

A negative exponent indicates division by a power of ten.

Question 16. Evaluate (8.0 × 10⁶) ÷ (2.0 × 10²).

4.0 × 10⁸ 6.0 × 10⁴ 4.0 × 10⁴ 4.0 × 10³

Hint for question 16

When dividing powers of ten, subtract exponents.

Question 17. How many decimal places should a sum of 12.30 g + 0.4 g retain?

One decimal place Zero decimal places Three decimal places Two decimal places

Hint for question 17

Addition follows decimal places, not significant figures.

Question 18. Which measurement is reported with three significant figures?

0.005 L 0.050 L 0.0500 L 0.05000 L

Hint for question 18

Leading zeros do not count; final recorded decimal zeros do.

Question 19. Convert 120 seconds to minutes.

7200 minutes 0.5 minute 2 minutes 20 minutes

Hint for question 19

Place seconds in denominator to cancel it.

Question 20. Convert 750 µL into mL.

75.0 mL 0.750 mL 0.0750 mL 7.50 mL

Hint for question 20

Compare micro (10⁻⁶) with milli (10⁻³).

Question 21. From q=mcΔT, which expression isolates c?

c=q/(mΔT) c=mΔT/q c=qmΔT c=q/m+ΔT

Hint for question 21

Treat mΔT as one multiplication group.

Question 22. Solve 4(x−2)=20.

x=6 x=3 x=7 x=5

Hint for question 22

Undo the outer multiplication first.

Question 23. Find the slope between (2,5) and (4,11).

1/3 2 6 3

Hint for question 23

Subtract x and y coordinates in matching order.

Question 24. For y=3x+2, what is y when x=4?

18 12 9 14

Hint for question 24

Multiply before adding.

IntoChemistry original instructional content, 2026. Formative feedback is not an official course grade. Sources are linked for independent reading. Accessibility testing with your institution and assistive technology is still recommended.