Q: Which of the following is the correct conversion factor to convert cubic inches to cubic centimeters?

$$1 \text{ in}^3 = 16.387 \text{ cm}^3$$

Q: When converting $$194 cm to $$feet, which of the following is the correct sequence of conversion factors?

$$\frac{1 \text{ in}}{2.54 \text{ cm}} \times \frac{1 \text{ ft}}{12 \text{ in}}$$

Question 1

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

Accepted Answer

$$5.6 	imes 10$$^{2}$$

Question 2

Convert $$0.00034 to $$scientific notation.

Accepted Answer

$$3.4 	imes 10$$^{-4}$$

Question 3

How many significant figures are in the measurement $$1.080$$?

Accepted Answer

Four

Question 4

Which of the following is an exact number?

Accepted Answer

The number of eggs in a dozen

Question 5

A student measures the mass of a sample as $$27.2 g $$and its volume as $$22.5 mL. $$What is the density of the sample, reported to the correct number of significant figures?

Accepted Answer

$$1.21 g/mL$$

Question 6

Which SI prefix corresponds to $$10^{-6}$$?

Accepted Answer

micro-

Question 7

A measurement is recorded as $$24.6 mm. $$Which digit is estimated?

Accepted Answer

6

Question 8

Which of the following statements about mass and weight is correct?

Accepted Answer

Mass is independent of gravity, weight depends on gravity.

Question 9

How many significant figures should be reported in the result of $$5.74 + 0.823 + 2.651$$?

Accepted Answer

Two

Question 10

A car travels $$48.0 mi/$$gal. Convert this to km/L. ($$1 mi$$ $$= 1.609 km$$, $$1$$ gal $$= 3.785 L)$$

Accepted Answer

$$20.4 km/L$$

Question 11

Which of the following is the correct conversion factor to convert cubic inches to cubic centimeters?

Accepted Answer

$$1 	ext{ in}^3 = 16.387 	ext{ cm}^3$$

Question 12

A titanium bicycle frame has a mass of $$1.80 kg $$and a volume of $$400 cm$^3. $$What is the density of titanium in g/cm$$^3$$?

Accepted Answer

$$4.50$$ $$g/cm^3$

Question 13

Which of the following is the correct SI base unit for time?

Accepted Answer

Second (s)

Question 14

A sample of a liquid has a density of $$1.32 g/cm$^3. $$What volume in mL should be measured to obtain $$68.4 g of $$the liquid?

Accepted Answer

$$51.8 mL$$

Question 15

Which of the following is NOT a derived unit?

Accepted Answer

Meter (m)

Question 16

A NASA probe was supposed to establish orbit at $$1.55 	imes 10^5$ meters, but was programmed for 1.55$$ 	imes $$10^5$$ feet. What is the difference in kilometers between these two altitudes? ($$1 ft$$ $$= 0.3048 m)$$

Accepted Answer

$$46.3 km$$

Question 17

Which of the following rules is correct for rounding numbers in calculations?

Accepted Answer

Round only the final answer, not intermediate steps.

Question 18

Which of the following is the correct formula for density?

Accepted Answer

$$d = \frac{m}{V}$$

Question 19

When converting $$194 cm to $$feet, which of the following is the correct sequence of conversion factors?

Accepted Answer

$$\frac{1 	ext{ in}}{2.54 	ext{ cm}} 	imes \frac{1 	ext{ ft}}{12 	ext{ in}}$$

Question 20

Which of the following is true about leading zeros in a measured number?

Accepted Answer

They are never significant.

Measurement and Problem Solving in Introductory Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard