Question 1

Which of the following is the correct electron configuration for a neutral silicon atom?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^2$$

Question 2

An atom has 20 protons, 18 electrons, and 20 neutrons. What is its correct representation?

Accepted Answer

$$^{40}_{20}\mathrm{Ca}^{2+}$$

Question 3

How many valence electrons does oxygen have?

Accepted Answer

$$6$$

Question 4

What is the category of the chemical bond in Cl–Cl?

Accepted Answer

Non-polar covalent

Question 5

In the compound $$\mathrm{Fe}_2\mathrm{O}_3$$, what is the oxidation state of iron?

Accepted Answer

$$+3$$

Question 6

What is the correct formula for calcium oxide?

Accepted Answer

$$\mathrm{CaO}$$

Question 7

In the reaction $$Zn + Cu$$^{2+}$$ \rightarrow Zn$$^{2+}$$ + Cu$$, which species undergoes reduction?

Accepted Answer

$$Cu^{2+}$$

Question 8

Balance the following equation: $$N_2 + 3H_2$$ \rightarrow 2NH_3$$. What is the sum of the coefficients?

Accepted Answer

$$6$$

Question 9

How many moles are in $$22.4\ \mathrm{L} of a $$gas at STP?

Accepted Answer

$$1.00$$

Question 10

A container has 2 white gas particles and 8 gray ones. What is the mole fraction of white?

Accepted Answer

$$0.20$$

Question 11

A gas at $$1.5\ \mathrm{atm}$$ and $$300\ \mathrm{K} is $$heated to $$450\ \mathrm{K} at $$constant volume. What is the new pressure?

Accepted Answer

$$2.25\ \mathrm{atm}$$

Question 12

Which of the following is NOT an assumption of the kinetic molecular theory?

Accepted Answer

Attractive forces between particles are significant

Question 13

Which solution is the solute in a saltwater mixture?

Accepted Answer

Salt

Question 14

Which of the following is a strong electrolyte?

Accepted Answer

$$KCl_{(aq)}$$

Question 15

A $$25.0\ \mathrm{mL}$$ sample of $$4.0\ \mathrm{M}$$ NaOH is diluted to $$100.0\ \mathrm{mL}. $$What is the new concentration?

Accepted Answer

$$1.0\ \mathrm{M}$$

Question 16

Which of the following is the net ionic equation for the reaction $$AgNO_3_{(aq)} + NaCl_{(aq)} \rightarrow AgCl_{(s)} + NaNO_3_{(aq)}$$?

Accepted Answer

$$Ag^+_{(aq)} + Cl^-_{(aq)} \rightarrow AgCl_{(s)}$$

Question 17

Dissolving $$NH_4NO_3 in $$water makes the water colder. This process is:

Accepted Answer

Endothermic

Question 18

What is the IUPAC name for $$H_2SO_4$$?

Accepted Answer

Sulfuric acid

Question 19

A hydrogen atom has energy $$-2.18 	imes 10$$^{-18}$$\ \mathrm{J}. $$What is its principal quantum number $$n$$?

Accepted Answer

$$n = 1$$

Question 20

To eject more electrons in the photoelectric effect, you should:

Accepted Answer

Use shorter wavelength light

CHEM 1305 Final Exam Review: Comprehensive Study Notes for General Chemistry

Guida di studio - Domande di pratica