Question 1

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

Accepted Answer

$Cu(ClO_4)_2$

Question 2

How many significant figures are present in the number 0.00230122?

Accepted Answer

6

Question 3

Which of the following compounds contains the greatest number of oxygen atoms per formula unit?

Accepted Answer

Tetraphosphorous decoxide ($P_4O_{10}$)

Question 4

What is the correct name for the compound $Sr(NO_2)_2$?

Accepted Answer

Strontium nitrite

Question 5

A student dissolves 26.0 grams of $BaCl_2$ (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 magnesium chloride?

Accepted Answer

$MgCl_2$

Question 7

Which conversion factor would you use to convert 5.0 miles to kilometers?

Accepted Answer

$1\,mile = 1.60934\,km$

Question 8

Which of the following is INCORRECT regarding chemical formulas?

Accepted Answer

$NaSO_4$ for sodium sulfate

Question 9

Calculate the total number of atoms in one formula unit of $C_7H_8ClNO_2$.

Accepted Answer

20

Question 10

Which of the following is the correct name for $HBr(aq)$?

Accepted Answer

Hydrobromic acid

Question 11

A sphere has a radius of 4.00 cm. What is its volume in $cm^3$? (Use $Vol = \frac{4}{3}\pi r^3$, $\pi = 3.141592$)

Accepted Answer

$268\,cm^3$

Question 12

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

Accepted Answer

$K_2SO_4$

Question 13

Which of the following numbers has three significant figures?

Accepted Answer

13.3 $	imes$ $10^4$

Question 14

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

Accepted Answer

$P_4O_{10}$

Question 15

Which of the following is the correct name for $Al(CO_3)_3$?

Accepted Answer

Aluminum carbonate

Question 16

A solution is prepared by dissolving 10.0 g of $Na_2SO_4$ (molar mass = 142.04 g/mol) in enough water to make 250.0 mL of solution. What is the molarity?

Accepted Answer

$0.282\,M$

Question 17

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

Accepted Answer

$SO_2$

Question 18

Which of the following is the correct name for $HCO_3^-$?

Accepted Answer

Hydrogen carbonate

Question 19

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

Accepted Answer

$HPO_3^-$

Question 20

A chemist needs to prepare 500.0 mL of a 0.100 M $Ca(NO_2)_2$ solution. How many grams of $Ca(NO_2)_2$ (molar mass = 132.1 g/mol) are required?

Accepted Answer

6.61 g

General Chemistry 115: Exam 1B Study Notes

Study Guide - Practice Questions

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