Q: A rectangular block has dimensions $$2.00\ \mathrm{cm} \times 3.00\ \mathrm{cm} \times 4.00\ \mathrm{cm}. $$What is its volume in cubic meters ($$\mathrm{m}^3$$)?

$$2.40 \times 10$$^{-6}$$\ \mathrm{m}^3$$

Q: A laboratory experiment requires $$0.250\ \mathrm{kg} of a $$chemical. How many milligrams is this?

$$2.50 \times 10^6$\ \mathrm{mg}$$

Q: Which of the following conversions is correct for $$1.00\ \mathrm{cm}^3 to$$ $$\mathrm{m}^3$$?

$$1.00 \times 10$$^{-6}$$\ \mathrm{m}^3$$

Q: A student needs to convert $$5.00\ \mathrm{m}^3 to $$liters. What is the correct answer?

$$5.00 \times 10^6$\ \mathrm{L}$$

Question 1

Which of the following numbers is correctly expressed in scientific notation with the correct number of significant figures for the value 0.0045200?

Accepted Answer

$$4.5200 	imes 10$$^{-3}$$

Question 2

A student measures the mass of a metal cylinder as 13.45 g and its volume as 2.5 cm$$^3. $$What is the density of the cylinder, reported with the correct number of significant figures?

Accepted Answer

$$5.4\ \mathrm{g/cm^3$}$$

Question 3

Convert a temperature of $$-40.0\ ^\circ\mathrm{C} to $$Kelvin.

Accepted Answer

$$233.2\ \mathrm{K}$$

Question 4

Which of the following correctly matches the SI prefix with its corresponding power of ten?

Accepted Answer

milli: $$10^{-3}$$

Question 5

A rectangular block has dimensions $$2.00\ \mathrm{cm} 	imes 3.00\ \mathrm{cm} 	imes 4.00\ \mathrm{cm}. $$What is its volume in cubic meters ($$\mathrm{m}^3$$)?

Accepted Answer

$$2.40 	imes 10$$^{-6}$$\ \mathrm{m}^3$$

Question 6

Which of the following statements about the subatomic particles in an atom is correct?

Accepted Answer

Protons and neutrons are found in the nucleus; electrons are found outside the nucleus.

Question 7

Which of the following is the correct isotopic symbol for an atom with 17 protons, 18 neutrons, and 17 electrons?

Accepted Answer

$$^{35}_{17}\mathrm{Cl}$$

Question 8

A sample of ethanol has a density of $$0.789\ \mathrm{g/mL}. $$What is the mass, in grams, of $$250.0\ \mathrm{mL} of $$ethanol?

Accepted Answer

$$197.25\ \mathrm{g}$$

Question 9

Which of the following best describes how a sodium atom forms a sodium ion?

Accepted Answer

It loses one electron to form $$\mathrm{Na}^+.$$

Question 10

A laboratory experiment requires $$0.250\ \mathrm{kg} of a $$chemical. How many milligrams is this?

Accepted Answer

$$2.50 	imes 10^6$\ \mathrm{mg}$$

Question 11

Which of the following calculations is reported with the correct number of significant figures? $$3.45 	imes 2.1$$

Accepted Answer

$$7.2$$

Question 12

A neutral atom of magnesium has an atomic number of 12 and a mass number of 24. How many neutrons does it contain?

Accepted Answer

12

Question 13

Which of the following conversions is correct for $$1.00\ \mathrm{cm}^3 to$$ $$\mathrm{m}^3$$?

Accepted Answer

$$1.00 	imes 10$$^{-6}$$\ \mathrm{m}^3$$

Question 14

A patient’s body temperature is measured at $$102.2\ ^\circ\mathrm{F}. $$What is this temperature in Celsius?

Accepted Answer

$$39.0\ ^\circ\mathrm{C}$$

Question 15

Which of the following best describes the charge and relative mass of a neutron?

Accepted Answer

Neutral charge, mass approximately equal to a proton

Question 16

A sample contains $$6.02 	imes 10$$^{23}$$ atoms of carbon-14. Which of the following is the correct isotopic symbol for this isotope?

Accepted Answer

$$^{14}_{6}\mathrm{C}$$

Question 17

Which of the following best explains why the mass number of an atom is not found on the periodic table?

Accepted Answer

Because the periodic table lists the average atomic mass, not the mass number of individual isotopes.

Question 18

A chlorine ion has 17 protons and 18 electrons. What is the charge on this ion?

Accepted Answer

$$1^-$$

Question 19

A student needs to convert $$5.00\ \mathrm{m}^3 to $$liters. What is the correct answer?

Accepted Answer

$$5.00 	imes 10^6$\ \mathrm{L}$$

Question 20

Which of the following best describes the process of forming a $$\mathrm{Cl}^-$$ ion from a neutral chlorine atom?

Accepted Answer

The atom gains one electron.

General Chemistry I Exam 1 Study Guide: Chapters 1 & 2

Guida di studio - Domande di pratica

Study guide - Flashcard