Question 1

A patient’s temperature is measured as 102.2 $$^\circF. $$What is this temperature in degrees Celsius? Use the formula $$C = \frac{5}{9}(F - 32). $$Round your answer to the correct number of significant figures.

Accepted Answer

$$39.0\ ^\circ C$$

Question 2

Which of the following is a heterogeneous mixture?

Accepted Answer

Blood

Question 3

A sample of metal has a mass of 45.6 g and a volume of 16.0 mL. What is its density? Use the correct number of significant figures.

Accepted Answer

$$2.85\ \mathrm{g/mL}$$

Question 4

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

Accepted Answer

Halogens are found in Group 17.

Question 5

Which of the following is an example of kinetic energy?

Accepted Answer

A moving car

Question 6

How many protons, neutrons, and electrons are in an atom of $$^{27}_{13}\mathrm{Al}$$?

Accepted Answer

13 protons, 14 neutrons, 13 electrons

Question 7

Which of the following is the correct electron arrangement for a neutral atom of sodium ($$\mathrm{Na}$$, atomic number 11)?

Accepted Answer

2, 8, 1

Question 8

A 250.0 g sample of water is heated from $$22.0\ ^\circ C to$$ $$100.0\ ^\circ C. $$How much heat is absorbed? ($$c = 4.18\ \mathrm{J/g\ ^\circ C})$$

Accepted Answer

$$81,950\ \mathrm{J}$$

Question 9

Which of the following is a derived unit?

Accepted Answer

Joule

Question 10

Which of the following best describes the trend in atomic radius across a period from left to right?

Accepted Answer

Atomic radius decreases

Question 11

A student measures the length of a desk as 1.845 m. How should this value be reported if the measuring device is accurate to the nearest centimeter?

Accepted Answer

1.85 m

Question 12

Which of the following is a correct metric unit equivalent?

Accepted Answer

1 L = 1000 mL

Question 13

Which of the following changes of state is endothermic?

Accepted Answer

Melting

Question 14

A solution is prepared by dissolving 5.00 g of NaCl in 95.0 g of water. Which statement is correct?

Accepted Answer

Water is the solvent and NaCl is the solute.

Question 15

Which of the following best describes potential energy?

Accepted Answer

Energy stored due to position or composition

Question 16

Which of the following is NOT a subatomic particle?

Accepted Answer

Isotope

Question 17

A sample of ethanol has a density of $$0.789\ \mathrm{g/mL}. $$What is the mass of 50.0 mL of ethanol?

Accepted Answer

$$39.5\ \mathrm{g}$$

Question 18

Which of the following statements about states of matter is correct?

Accepted Answer

Solids have a definite shape and volume.

Question 19

Which of the following is the correct conversion factor to convert from centimeters to meters?

Accepted Answer

$$1\ \mathrm{cm} = 0.01\ \mathrm{m}$$

Question 20

Which of the following elements is most likely to form a positive ion?

Accepted Answer

Sodium

CHM 1032 Exam 1 Study Guide: Fundamental Concepts in GOB Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard