Question 1

Which of the following best describes a chemical change?

Accepted Answer

Burning wood in a campfire

Question 2

A student measures the temperature of a solution as $$25.0\ ^\circ\mathrm{C}. $$What is this temperature in Kelvin?

Accepted Answer

$$298.2\ \mathrm{K}$$

Question 3

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Salt dissolved in water

Question 4

Which of the following statements about the Law of Conservation of Mass is correct?

Accepted Answer

Mass is neither created nor destroyed in a chemical reaction

Question 5

How many significant figures are in the measurement $$0.004520\ \mathrm{g}$$?

Accepted Answer

4

Question 6

A graduated cylinder contains $$25.0\ \mathrm{mL} of $$water. A student adds a metal object, and the water rises to $$32.5\ \mathrm{mL}. If $$the mass of the object is $$60.0\ \mathrm{g}$$, what is its density?

Accepted Answer

$$2.40\ \mathrm{g/mL}$$

Question 7

Which of the following is an extensive property?

Accepted Answer

Mass

Question 8

Convert $$5.72\$$times10^3$$\ \mathrm{g} to $$kilograms.

Accepted Answer

$$5.72\ \mathrm{kg}$$

Question 9

Which of the following is the correct SI unit for measuring electric current?

Accepted Answer

Ampere ($$\mathrm{A})$$

Question 10

A sample of gold has a mass of $$19.3\ \mathrm{g}$$ and a volume of $$1.00\ \mathrm{cm}^3. $$What is the density of gold?

Accepted Answer

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

Question 11

Which of the following is NOT a physical change?

Accepted Answer

Rusting of iron

Question 12

A student records the following measurements: $$2.00\ \mathrm{g}$$, $$2.0\ \mathrm{g}$$, and $$2.000\ \mathrm{g}. $$Which measurement has the greatest number of significant figures?

Accepted Answer

$$2.000\ \mathrm{g}$$

Question 13

Which of the following is a compound?

Accepted Answer

Sodium chloride ($$\mathrm{NaCl})$$

Question 14

What is the correct metric prefix for $$10^{-6}$$?

Accepted Answer

Micro-

Question 15

A car travels $$150.0\ \mathrm{km} in$$ $$2.00\ \mathrm{h}. $$What is its average speed in meters per second ($$\mathrm{m/s}$$)?

Accepted Answer

$$20.8\ \mathrm{m/s}$$

Question 16

Which of the following is an example of a qualitative measurement?

Accepted Answer

The solution is blue

Question 17

Which of the following is the correct rule for determining the number of significant figures in the result of a multiplication or division?

Accepted Answer

The result should have as many significant figures as the measurement with the fewest significant figures

Question 18

Which of the following is a correct SI base unit and its quantity?

Accepted Answer

Meter for length

Question 19

A student needs to convert $$250.0\ \mathrm{mL} to $$liters. What is the correct answer?

Accepted Answer

$$0.250\ \mathrm{L}$$

Question 20

Which of the following best describes an element?

Accepted Answer

A substance that cannot be chemically broken down into simpler substances

Chapter 1 Student Notes

Guida di studio - Domande di pratica

Study guide - Flashcard