Question 1

A sample of gold has a mass of 96.5 g and a volume of 5.00 cm$$^3. $$What is the density of gold in g/cm$$^3$$?

Accepted Answer

$$19.3\ \mathrm{g/cm}^3$$

Question 2

Which of the following is a chemical change?

Accepted Answer

Rusting of iron

Question 3

How many significant figures are in the measurement 0.004560 kg?

Accepted Answer

4

Question 4

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout

Question 5

A patient receives 500 mL of saline solution. If the density of the solution is $$1.01\ \mathrm{g/mL}$$, what is the mass of the solution in grams?

Accepted Answer

$$505\ \mathrm{g}$$

Question 6

Which statement is NOT part of Dalton’s Atomic Theory?

Accepted Answer

Atoms are composed of protons, neutrons, and electrons.

Question 7

Which element is a metalloid?

Accepted Answer

Silicon (Si)

Question 8

What is the correct formula for the compound formed between magnesium and nitrate ion?

Accepted Answer

$$\mathrm{Mg(NO_3$)_2}$$

Question 9

Which of the following molecules is nonpolar?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 10

A 50.0 g sample of water is heated from $$20.0\ ^\circ\mathrm{C} to$$ $$80.0\ ^\circ\mathrm{C}. If $$the specific heat of water is $$4.18\ \mathrm{J/g\cdot ^\circ C}$$, how much heat is absorbed?

Accepted Answer

$$12,540\ \mathrm{J}$$

Question 11

Which group on the periodic table is known as the alkali metals?

Accepted Answer

Group 1

Question 12

What is the average atomic mass of chlorine if $$^{35}\mathrm{Cl} ($$mass = 34.97 u, abundance = 75.8%) and $$^{37}\mathrm{Cl} ($$mass = 36.97 u, abundance = 24.2%)?

Accepted Answer

$$35.5\ \mathrm{u}$$

Question 13

Which of the following is a covalent compound?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 14

Which of the following best describes the electron arrangement of a neutral sodium atom?

Accepted Answer

2, 8, 1

Question 15

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 16

A sample of gas occupies 2.50 L at 25$$^\circC. If $$the temperature is increased to 75$$^\circC at $$constant pressure, what is the new volume? (Use $$V_1$$/$$T_1$$ = $$V_2$$/$$T_2$$, temperatures in K)

Accepted Answer

$$2.93\ \mathrm{L}$$

Question 17

Which of the following is a physical property?

Accepted Answer

Melting point

Question 18

Which of the following ions has the same electron configuration as neon?

Accepted Answer

$$\mathrm{Na^+}$$

Question 19

Which of the following best describes the shape of a methane ($$\mathrm{CH_4$}) $$molecule?

Accepted Answer

Tetrahedral

Question 20

A solution has a specific gravity of 1.20. If the density of water is $$1.00\ \mathrm{g/mL}$$, what is the density of the solution?

Accepted Answer

$$1.20\ \mathrm{g/mL}$$

Chemistry 101 Exam 1 Review: Matter, Measurement, Atomic Structure, and Compounds

Guida di studio - Domande di pratica

Study guide - Flashcard