$$2.5 \times 10$$^{-6}$$\ \mathrm{m}^3$$

$$1.63\ \mathrm{m} \times \dfrac{100\ \mathrm{cm}}{1\ \mathrm{m}}$$

Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of atoms from two or more different elements in a fixed ratio.

Question 2

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

Accepted Answer

Salt dissolved in water

Question 3

A weather forecaster predicts the temperature will reach $$31\ ^\circ\mathrm{C}. $$What is this temperature in Kelvin?

Accepted Answer

$$304\ \mathrm{K}$$

Question 4

Which of the following statements about significant figures is correct?

Accepted Answer

Zeroes at the end of a number are significant if the number contains a decimal point.

Question 5

Convert $$2.5\ \mathrm{cm}^3 to$$ $$\mathrm{m}^3.$$

Accepted Answer

$$2.5 	imes 10$$^{-6}$$\ \mathrm{m}^3$$

Question 6

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

Accepted Answer

Kilogram (kg)

Question 7

A sample of ethanol has a mass of $$15.8\ \mathrm{g}$$ and a volume of $$20.0\ \mathrm{mL}. $$What is its density?

Accepted Answer

$$0.79\ \mathrm{g/mL}$$

Question 8

Which of the following is an example of an exact number?

Accepted Answer

The number of students in a classroom

Question 9

Which of the following conversions is correct for changing $$1.63\ \mathrm{m} to $$centimeters?

Accepted Answer

$$1.63\ \mathrm{m} 	imes \dfrac{100\ \mathrm{cm}}{1\ \mathrm{m}}$$

Question 10

A student adds $$10.34$$, $$100.7$$, and $$13$$ together. What is the correct answer with the proper number of significant figures?

Accepted Answer

$$124$$

Question 11

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close measurements are to the true value; precision is how close measurements are to each other.

Question 12

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

Accepted Answer

$$^\circ\mathrm{F} = \dfrac{9}{5}(^\circ\mathrm{C}) + 32$$

Question 13

Which of the following is a derived SI unit?

Accepted Answer

Liter (L)

Question 14

A cube has sides of length $$2.0\ \mathrm{cm}. $$What is its volume in $$\mathrm{cm}^3$$?

Accepted Answer

$$8.0\ \mathrm{cm}^3$$

Question 15

Which of the following is the correct relationship between milliliters and liters?

Accepted Answer

$$1\ \mathrm{mL} = 0.001\ \mathrm{L}$$

Question 16

A sample of gold has a mass of $$38.64\ \mathrm{g}$$ and a volume of $$2.00\ \mathrm{cm}^3. $$What is its density?

Accepted Answer

$$19.32\ \mathrm{g/cm}^3$$

Question 17

Which of the following is NOT a physical property?

Accepted Answer

Ability to rust

Question 18

Which of the following is the correct metric prefix for $$10^{-9}$$?

Accepted Answer

Nano-

Question 19

A can of soda contains $$355\ \mathrm{mL} of $$liquid. How many liters is this?

Accepted Answer

$$0.355\ \mathrm{L}$$

Chapter 1: Matter, Energy, and Measurement – GOB Chemistry Study Notes

Guida di studio - Domande di pratica