Q: Convert $$0.0056$$ kilometers to centimeters using scientific notation.

$$5.6 \times 10^4$\ \mathrm{cm}$$

Q: Which of the following is the correct formula for converting Celsius to Fahrenheit?

$$F = (C \times \frac{9}{5}) + 32$$

Q: Which of the following is the correct formula for specific heat?

$$q = m \times c \times \Delta T$$

Q: Which of the following is the correct formula for calculating the weighted average atomic mass?

$$\text{mass}_{\text{avg}} = \text{Abundance}_1 \times \text{mass}_1 + \text{Abundance}_2 \times \text{mass}_2$$

Question 1

Which of the following best describes a chemical property?

Accepted Answer

Ability of iron to rust when exposed to air

Question 2

A student measures the mass of a sample as 12.34 g and its volume as 4.2 mL. What is the density of the sample, reported with the correct number of significant figures?

Accepted Answer

$$2.9\ \mathrm{g/mL}$$

Question 3

Which step of the scientific method involves making a prediction based on a hypothesis?

Accepted Answer

Testing the hypothesis with an experiment

Question 4

Convert $$0.0056$$ kilometers to centimeters using scientific notation.

Accepted Answer

$$5.6 	imes 10^4$\ \mathrm{cm}$$

Question 5

Which of the following is a heterogeneous mixture?

Accepted Answer

Sand and iron filings

Question 6

A patient receives 250 mL of a saline solution. If the solution has a density of $$1.05\ \mathrm{g/mL}$$, what is the mass of the solution?

Accepted Answer

$$262.5\ \mathrm{g}$$

Question 7

Which of the following is the correct formula for converting Celsius to Fahrenheit?

Accepted Answer

$$F = (C 	imes \frac{9}{5}) + 32$$

Question 8

Which scientist's experiment led to the discovery of the electron?

Accepted Answer

Thomson

Question 9

What is the mass number of an atom with 15 protons and 16 neutrons?

Accepted Answer

$$31$$

Question 10

Which of the following is NOT a physical property?

Accepted Answer

Reactivity with acid

Question 11

A sample of metal has a mass of $$45.0\ \mathrm{g}$$ and a volume of $$15.0\ \mathrm{mL}. $$What is its density?

Accepted Answer

$$3.00\ \mathrm{g/mL}$$

Question 12

Which of the following is the correct definition of an isotope?

Accepted Answer

Atoms with the same number of protons but different numbers of neutrons

Question 13

Which of the following is the correct formula for specific heat?

Accepted Answer

$$q = m 	imes c 	imes \Delta T$$

Question 14

Which of the following statements about significant figures is TRUE?

Accepted Answer

When adding, the answer should have as many decimal places as the number with the fewest decimal places.

Question 15

Which of the following is a chemical change?

Accepted Answer

Burning wood

Question 16

Which of the following is the correct definition of atomic number?

Accepted Answer

Number of protons in the nucleus

Question 17

A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. Which of the following is the empirical formula?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 18

Which of the following is the correct formula for calculating the weighted average atomic mass?

Accepted Answer

$$	ext{mass}_{	ext{avg}} = 	ext{Abundance}_1 	imes 	ext{mass}_1 + 	ext{Abundance}_2 	imes 	ext{mass}_2$$

Question 19

Which of the following is a correct example of a derived unit?

Accepted Answer

$$\mathrm{m^3$} ($$cubic meter)

Question 20

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have similar chemical properties.

Introduction to Chemistry: Study Guide for Exam 1 (Chapters 1–4)

Guida di studio - Domande di pratica

Study guide - Flashcard