Question 1

Which of the following is the correct chemical formula for potassium sulfate?

Accepted Answer

$\mathrm{K_2SO_4}$

Question 2

How many significant figures are present in the number 0.00230122?

Accepted Answer

6

Question 3

What is the correct name for the compound $\mathrm{Sr(NO_3)_2}$?

Accepted Answer

Strontium nitrate

Question 4

Which of the following is the correct formula for tetraphosphorous decoxide?

Accepted Answer

$\mathrm{P_4O_{10}}$

Question 5

A student dissolves 26.0 grams of $\mathrm{BaCl_2}$ (molar mass = 208.2 g/mol) in enough water to make 450.0 mL of solution. What is the molarity of the solution?

Accepted Answer

0.278 M

Question 6

Which of the following is the correct formula for barium chlorate?

Accepted Answer

$\mathrm{Ba(ClO_3)_2}$

Question 7

What is the correct name for the compound $\mathrm{Cu(ClO_4)_2}$?

Accepted Answer

Copper(II) perchlorate

Question 8

Which of the following numbers has three significant figures?

Accepted Answer

13.3 $	imes$ $10^4$

Question 9

Which of the following is the correct formula for magnesium chloride?

Accepted Answer

$\mathrm{MgCl_2}$

Question 10

A solution is prepared by dissolving 5.00 g of NaCl (molar mass = 58.44 g/mol) in enough water to make 250.0 mL of solution. What is the molarity of the solution?

Accepted Answer

0.342 M

Question 11

Which of the following is the correct name for $\mathrm{HBr(aq)}$?

Accepted Answer

Hydrobromic acid

Question 12

Which of the following is the correct formula for calcium nitrite?

Accepted Answer

$\mathrm{Ca(NO_2)_2}$

Question 13

Which of the following is the correct name for $\mathrm{Na_2SO_4}$?

Accepted Answer

Sodium sulfate

Question 14

Which of the following is the correct formula for hydrogen phosphite?

Accepted Answer

$\mathrm{H_3PO_3}$

Question 15

Which of the following is the correct formula for sulfur dioxide?

Accepted Answer

$\mathrm{SO_2}$

Question 16

A sphere has a radius of 2.00 cm. What is its volume in $\mathrm{cm^3}$? (Use $\pi = 3.141592$ and $V = \frac{4}{3}\pi r^3$)

Accepted Answer

33.51 $\mathrm{cm^3}$

Question 17

Which of the following is the correct name for $\mathrm{HCIO_4}$?

Accepted Answer

Perchloric acid

Question 18

Which of the following is the correct formula for copper(II) perchlorate?

Accepted Answer

$\mathrm{Cu(ClO_4)_2}$

Question 19

Which of the following is the correct formula for ammonium acetate?

Accepted Answer

$\mathrm{NH_4C_2H_3O_2}$

Question 20

A student needs to prepare 500.0 mL of a 0.250 M $\mathrm{Na_2SO_4}$ solution. How many grams of $\mathrm{Na_2SO_4}$ (molar mass = 142.04 g/mol) are required?

Accepted Answer

17.8 g

General Chemistry 115: Exam 1B Study Notes

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