Question 1

Which of the following compounds is a weak electrolyte in aqueous solution?

Accepted Answer

HC2H3O2

Question 2

What is the balanced molecular equation for the complete neutralization of HNO3 by LiOH in aqueous solution?

Accepted Answer

$$\mathrm{$$HNO_3$$\ (aq) + LiOH\ (aq) \rightarrow H_2O\ (l) + $$LiNO_3$$\ (aq)}$$

Question 3

Which of the following is insoluble in water?

Accepted Answer

FeCO3

Question 4

What is the oxidation state of phosphorus in $$\mathrm{PO_3$^{3-}}$$?

Accepted Answer

$$+3$$

Question 5

Which of the following reactions will occur based on the activity series?

Accepted Answer

$$\mathrm{Mg\ (s) + $$NiCl_2$$\ (aq) \rightarrow $$MgCl_2$$\ (aq) + Ni\ (s)}$$

Question 6

Calculate the molarity of a solution formed by dissolving 97.7 g of LiBr in enough water to yield 750.0 mL of solution. (Molar mass of LiBr = 86.85 g/mol)

Accepted Answer

$$1.50\ \mathrm{M}$$

Question 7

How many milliliters of a $$0.266\ \mathrm{M}$$ LiNO$$_3$$ solution are required to make $$150.0\ \mathrm{mL} of$$ $$0.075\ \mathrm{M}$$ LiNO$$_3$$ solution?

Accepted Answer

$$42.3\ \mathrm{mL}$$

Question 8

A chemical reaction absorbs heat from the surroundings. What is the sign of $$\Delta H at $$constant pressure?

Accepted Answer

Positive

Question 9

What is the pressure in atmospheres of a gas sample at $$731\ \mathrm{mmHg}$$?

Accepted Answer

$$0.961\ \mathrm{atm}$$

Question 10

A fixed amount of gas at $$25.0\ ^\circ\mathrm{C}$$ occupies a volume of $$8.66\ \mathrm{L} at$$ $$629\ \mathrm{torr}. $$What will be the volume at $$112\ ^\circ\mathrm{C} at $$the same pressure? (Use Charles's Law)

Accepted Answer

$$11.2\ \mathrm{L}$$

Question 11

Which balloon (A, B, or C) best represents the result when the pressure on a balloon is increased from $$0.98\ \mathrm{atm} to$$ $$1.2\ \mathrm{atm} at $$constant temperature?

Accepted Answer

A

Question 12

Using the bond enthalpy table, estimate $$\Delta H$$ for the combustion of ethane ($$\mathrm{C_2H_6}) as $$shown in the reaction:

$$2\mathrm{C_2H_6\ (g)} + 7\mathrm{O_2$\ (g)} \rightarrow 4\mathrm{CO_2$\ (g)} + 6\mathrm{H_2O\ (g)}$$

Accepted Answer

$$-2831\ \mathrm{kJ}$$

Question 13

What is the density of $$\mathrm{CO_2$}$$ gas at $$1106.2\ \mathrm{mmHg}$$ and $$56.3\ ^\circ\mathrm{C}$$?

Accepted Answer

$$2.37\ \mathrm{g/L}$$

Question 14

Arrange the following gases in order of increasing average molecular speed at $$25\ ^\circ\mathrm{C}$$: $$\mathrm{Cl_2$}$$, $$\mathrm{O_2$}$$, $$\mathrm{F_2$}$$, $$\mathrm{N_2$}.$$

Accepted Answer

$$\mathrm{Cl_2$ \u003c F_2$ \u003c O_2$ \u003c N_2$}$$

Question 15

A sample of methane ($$\mathrm{CH_4$}) $$occupies $$318.0\ \mathrm{mL} at$$ $$25\ ^\circ\mathrm{C}$$ and $$1010.0\ \mathrm{mmHg}. If $$the volume is expanded to $$770.0\ \mathrm{mL} at$$ $$298\ \mathrm{K}$$, what will be the pressure?

Accepted Answer

$$417.1\ \mathrm{mmHg}$$

Question 16

What is the volume at STP of $$4.00\ \mathrm{g} of$$ $$\mathrm{CH_4$}$$?

Accepted Answer

$$5.60\ \mathrm{L}$$

Question 17

Which of the following is the correct net ionic equation for the reaction between copper(II) chloride and sodium hydroxide?

Accepted Answer

$$\mathrm{Cu$$^{2+}$$\ (aq) + 2OH^-\ (aq) \rightarrow Cu(OH)_2\ (s)}$$

General Chemistry Exam Review Guidance: Electrolytes, Thermochemistry, Gas Laws, and More

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