Question 1

Which of the following best describes the relationship shown in the graph 'Volume of a Balloon versus Temperature'?

Accepted Answer

As temperature increases, the volume of the balloon increases, indicating a direct relationship.

Question 2

A tablet contains 325 mg of aspirin and has a total mass of 545 mg. What is the percentage of aspirin in the tablet? Use the formula: $$	ext{Percentage} = \frac{	ext{Part}}{	ext{Whole}} 	imes 100\%$$

Accepted Answer

$$59.6\%$$

Question 3

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$$8.6 	imes 10$$^{-4}$$

Question 4

What is the result of the following calculation: $$4 + (-10) - 5$$?

Accepted Answer

$$-11$$

Question 5

Which key on a scientific calculator would you use to change a positive number to a negative number?

Accepted Answer

The $$\pm ($$change sign) key

Question 6

Solve for $$x in $$the equation $$2x + 8 = 14.$$

Accepted Answer

$$x = 3$$

Question 7

Which of the following is the correct place value for the digit 2 in the number 15.24?

Accepted Answer

Hundredths place

Question 8

A scientist measures the diameter of a virus as $$8 	imes 10$$^{-8}$$ meters. Which of the following best explains why scientific notation is used in this context?

Accepted Answer

It allows for easier comparison of very large or very small values.

Question 9

Which of the following is the correct result for $$2 	imes (-3)$$?

Accepted Answer

$$-6$$

Question 10

A human scalp contains approximately $$1 	imes 10^5$ hairs. What is this number in standard notation?

Accepted Answer

$$100,000$$

Question 11

Which of the following statements about addition of positive and negative numbers is correct?

Accepted Answer

When adding a positive and a negative number, subtract the smaller absolute value from the larger and keep the sign of the larger.

Question 12

Which of the following is the correct scientific notation for 64,000?

Accepted Answer

$$6.4 	imes 10^4$

Question 13

If a balloon's volume increases from 24 L to 30 L as the temperature rises from 290 K to 370 K, what type of relationship is this?

Accepted Answer

Direct relationship

Question 14

Which of the following is the correct way to solve for $$y in $$the equation $$3y - 9 = 0$$?

Accepted Answer

$$y = 3$$

Question 15

A solution contains 0.021 g of solute in 1.0 g of solution. What is the percentage of solute? Use $$	ext{Percentage} = \frac{	ext{Part}}{	ext{Whole}} 	imes 100\%.$$

Accepted Answer

$$2.1\%$$

Question 16

Which of the following is the correct result for $$8 \div (-4)$$?

Accepted Answer

$$-2$$

Question 17

Which of the following is NOT a key math skill used in chemistry according to the concept map?

Accepted Answer

Balancing Chemical Equations

Question 18

What is the coefficient in the scientific notation $$2.4 	imes 10^3$?

Accepted Answer

$$2.4$$

Question 19

Which of the following best explains why understanding place value is important in chemistry calculations?

Accepted Answer

It ensures accuracy when reading and recording measurements.

Key Math Skills for Chemistry: Foundations for GOB Chemistry

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