Q: Which of the following statements best describes the relationship between wavelength ($$\lambda) $$and frequency ($$\nu) of $$electromagnetic radiation?

$$\lambda$$ and $$\nu$$ are inversely proportional

Question 1

A grilled cheese sandwich requires 2 slices of bread and 1 slice of cheese. If you have 28 slices of bread and 11 slices of cheese, what is the maximum number of sandwiches you can make, and which ingredient is the limiting reactant?

Accepted Answer

11 sandwiches; cheese is the limiting reactant

Question 2

In a chemical reaction, 5.00 g of reactant A produces 3.50 g of product B. If the theoretical yield is 4.00 g, what is the percent yield? Use the formula $$	ext{Percent Yield} = \frac{	ext{Actual Yield}}{	ext{Theoretical Yield}} 	imes 100\%.$$

Accepted Answer

$$87.5\%$$

Question 3

Which of the following statements best describes the relationship between wavelength ($$\lambda) $$and frequency ($$
u) of $$electromagnetic radiation?

Accepted Answer

$$\lambda$$ and $$
u$$ are inversely proportional

Question 4

Arrange the following types of electromagnetic radiation in order of increasing energy per photon: microwaves, visible light, X-rays.

Accepted Answer

Microwaves \u003c Visible light \u003c X-rays

Question 5

A chemist reacts 1.589 g of sodium carbonate with excess iron (III) chloride in water. If the molar mass of sodium carbonate is $$105.99\ 	ext{g/mol}$$, how many moles of sodium carbonate are used?

Accepted Answer

$$0.0150\ 	ext{mol}$$

Question 6

Which of the following molecules will have hydrogen bonding as the strongest intermolecular force?

Accepted Answer

CH$$_3OH$$

Question 7

Which of the following best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water due to hydrogen bonding

Question 8

A 0.120 L solution contains 5.00 g of Na$$_2CO$_3 ($$molar mass = $$106.0\ 	ext{g/mol}). $$What is the molarity of the solution?

Accepted Answer

$$0.394\ 	ext{M}$$

Question 9

Which of the following solutions is a strong electrolyte?

Accepted Answer

NaCl(aq)

Question 10

Which of the following acids is classified as a strong acid?

Accepted Answer

HCl

Question 11

A sample of gas has an initial volume of 158 mL at a pressure of 735 mm Hg and a temperature of 34°C. If the gas is compressed to a volume of 108 mL and heated to 85°C, what is the final pressure in mm Hg? Use the combined gas law: $$\frac{P_1V_1}{T_1$} = \frac{P_2V_2}{T_2$} ($$temperatures in Kelvin).

Accepted Answer

1240 mm Hg

Question 12

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

Accepted Answer

Atomic size decreases

Question 13

Which of the following is the correct electron configuration for a ground-state sulfur atom (S, atomic number 16)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^4$$

Question 14

Which of the following molecules is nonpolar?

Accepted Answer

CO$$_2$$

Question 15

A solution is prepared by dissolving 2 g of sugar in 100 mL of water. Which is the solute?

Accepted Answer

Sugar

Question 16

Which of the following best describes why oil and water do not mix?

Accepted Answer

Oil is nonpolar and water is polar, so their intermolecular forces are not compatible

Question 17

What is the pH of a solution with $$[H_3O^+] = 1.5 	imes 10$$^{-7}$$\ 	ext{M}$$? Use $$	ext{pH} = -\log [H_3O^+].$$

Accepted Answer

6.82

Question 18

Which of the following is a correct statement about the effect of temperature on solubility?

Accepted Answer

The solubility of a gas decreases as temperature increases

Question 19

Which of the following is the correct formula for the ideal gas law?

Accepted Answer

$$PV = nRT$$

Quantities in Chemical Reactions, Electrons in Atoms, and the Periodic Table: Structured Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard