Question 1

Which of the following combinations represents compounds rather than elements?
I. O3
II. CCl4
III. S8
IV. H2O

Accepted Answer

A) I + II 
B) III + IV 
C) I + III 
D) II + IV 
A) I + II 
B) III + IV 
C) I + III 
D) II + IV

Question 2

Calculate the mass of sugar in 250 g of a mixture that contains 35 mass percent sugar.

Accepted Answer

The answer of Calculate the mass of sugar in 250...

Question 3

Which of the following substances has the lowest density?

Accepted Answer

A) A mass of 1.5 kg and a volume of 1.2 L 
B) A mass of 25 g and a volume of 20 mL 
C) A mass of 750 g and a volume of 70 dL 
D) A mass of 5 mg and a volume of 25 uL 
A) A mass of 1.5 kg and a volume of 1.2 L 
B) A mass of 25 g and a volume of 20 mL 
C) A mass of 750 g and a volume of 70 dL 
D) A mass of 5 mg and a volume of 25 uL

Question 4

Perform the following mathematical operations. Give the answer with the proper number of significant figures.
A)(2.45 × 105)(5.6 × 104)=
B)(7.5 × 107)÷ (8.566 × 105)=
C)(3.45 × 10-9)+ (0.326 × 10-9)=

Accepted Answer

A)1.4 × 10

Question 5

Which of the following combinations represents only halogens?
I. O
II. He
III. I
IV. Br

Accepted Answer

A) I + II 
B) III + IV 
C) II + III 
D) I + IV 
A) I + II 
B) III + IV 
C) II + III 
D) I + IV

Question 6

Identify the number of particles of each element in the following compounds:
A)H2O2 - hydrogen peroxide
B)C6H12O6 - glucose
C)CaCO3 - chalk

Accepted Answer

A)2 hydrogen atoms, 2 oxygen a

Question 7

Which of the following is a pure substance?

Accepted Answer

A) Sugar 
B) Sand 
C) Gold 
D) Maple syrup 
A) Sugar 
B) Sand 
C) Gold 
D) Maple syrup

Question 8

Convert 152 miles into kilometers, using proper significant figures, given that 1 mile = 1.609 km.

Accepted Answer

A) 94.4 km 
B) 94 km 
C) 244.57 km 
D) 245 km 
A) 94.4 km 
B) 94 km 
C) 244.57 km 
D) 245 km

Question 9

What is the coefficient for O2 when this equation is balanced with the lowest whole number coefficients?
C2H6 + O2 ? CO2 + H2O

Accepted Answer

A) 3 
B) 4 
C) 6 
D) 7 
A) 3 
B) 4 
C) 6 
D) 7

Question 10

What is the total of all the coefficients when the following equation is balanced with the lowest whole number coefficients?
N2H4 + H2O2 ? N2 + H2O

Accepted Answer

A) 4 
B) 8 
C) 10 
D) 12 
A) 4 
B) 8 
C) 10 
D) 12

Question 11

Calculate the following percentages.
A)30% of 300
B)7.5% of 4.0 × 10S1U1P15S1S1P0
C)0.50% of 0.060S1S1P0

Accepted Answer

A)90,
B)3.

Question 12

Write the numerical value for 56,000 ÷ 7.89 with the correct number of significant figures:

Accepted Answer

A) 70.976 
B) 71 
C) 70.98 
D) 71.0 
A) 70.976 
B) 71 
C) 70.98 
D) 71.0

Question 13

Selenium is a nonmetal.

Accepted Answer

A) True 
 B)False

Question 14

Calculate the densities of the following objects. in g/mL
A)A mass of 86 g and a volume of 95 mL.
B)A mass of 1.6 kg and a volume of 1.3 L
C)A mass of 17 kg and a volume of 850 mL
D)A mass of 870 g and a volume of 25 dL
E)A mass of 45 mg and a volume of 45 μL

Accepted Answer

all answers in g/mL:

Question 15

How many O atoms are in the formula unit GaO(NO3)2?

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 7 
A) 3 
B) 4 
C) 5 
D) 7

Question 16

Round the following number to 2 significant figures: 105,006

Accepted Answer

A) 100,000 
B) 110,000 
C) 1)1 × 105 
D) 1)1 × 106 
A) 100,000 
B) 110,000 
C) 1)1 × 105 
D) 1)1 × 106

Question 17

What is the total dose required for a 140 lb patient if the amount required is 28 mg/kg bodyweight?

Accepted Answer

A) 1)8 mg 
B) 1)8 g 
C) 3)9 mg 
D) 3)9 g 
A) 1)8 mg 
B) 1)8 g 
C) 3)9 mg 
D) 3)9 g

Question 18

Using Table 1.4 in the text, determine which of these substances would show the largest temperature increase, if equal masses of each were heated with the same quantity of energy.

Accepted Answer

A) Air 
B) Gold 
C) Iron 
D) Paraffin wax 
A) Air 
B) Gold 
C) Iron 
D) Paraffin wax

Question 19

Kinetic energy is stored energy.

Accepted Answer

A) True 
 B)False

Question 20

How many H atoms are in the molecule C6H3(C3H7)2(C2H5)?

Accepted Answer

A) 10 
B) 15 
C) 22 
D) 27 
A) 10 
B) 15 
C) 22 
D) 27

Which of the following combinations represents compounds rather than elements? I. O₃ II. CCl₄ III. S₈ IV. H₂O

Calculate the mass of sugar in 250 g of a mixture that contains 35 mass percent sugar.

Which of the following substances has the lowest density?

Perform the following mathematical operations. Give the answer with the proper number of significant figures. A)(2.45 × 10⁵)(5.6 × 10⁴)= B)(7.5 × 10⁷)÷ (8.566 × 10⁵)= C)(3.45 × 10^-9)+ (0.326 × 10^-9)=

Which of the following combinations represents only halogens? I. O II. He III. I IV. Br

Identify the number of particles of each element in the following compounds: A)H₂O₂ - hydrogen peroxide B)C₆H₁₂O₆ - glucose C)CaCO₃ - chalk

Which of the following is a pure substance?

Convert 152 miles into kilometers, using proper significant figures, given that 1 mile = 1.609 km.

What is the coefficient for O₂ when this equation is balanced with the lowest whole number coefficients? C₂H₆ + O₂ ? CO₂ + H₂O

What is the total of all the coefficients when the following equation is balanced with the lowest whole number coefficients? N₂H₄ + H₂O₂ ? N₂ + H₂O

Calculate the following percentages. A)30% of 300 B)7.5% of 4.0 × 10⁵ C)0.50% of 0.060

Write the numerical value for 56,000 ÷ 7.89 with the correct number of significant figures:

Selenium is a nonmetal.

Calculate the densities of the following objects. in g/mL A)A mass of 86 g and a volume of 95 mL. B)A mass of 1.6 kg and a volume of 1.3 L C)A mass of 17 kg and a volume of 850 mL D)A mass of 870 g and a volume of 25 dL E)A mass of 45 mg and a volume of 45 μL

How many O atoms are in the formula unit GaO(NO₃)₂?

Round the following number to 2 significant figures: 105,006

What is the total dose required for a 140 lb patient if the amount required is 28 mg/kg bodyweight?

Using Table 1.4 in the text, determine which of these substances would show the largest temperature increase, if equal masses of each were heated with the same quantity of energy.

Kinetic energy is stored energy.

How many H atoms are in the molecule C₆H₃(C₃H₇)₂(C₂H₅)?

Atoms and Radioactivity

Compounds - Putting Particles Together

Introduction to Organic Compounds

Chemical Reactions

Carbohydrates - Lifes Sweet Molecules

Whats the Attraction State Changes, Solubility, and Lipids

Solution Chemistry: How Sweet Is Your Tea

Acids, Bases, and Buffers in the Body

Proteins - Workers of the Cell

Nucleic Acids - Big Molecules With a Big Role

Food As Fuel - A Metabolic Overview

Filters

Exam 1: Chemistry Basics - Matter and Measurement

Which of the following combinations represents compounds rather than elements? I. O3 II. CCl4 III. S8 IV. H2O

Calculate the mass of sugar in 250 g of a mixture that contains 35 mass percent sugar.

Which of the following substances has the lowest density?

Perform the following mathematical operations. Give the answer with the proper number of significant figures. A)(2.45 × 105)(5.6 × 104)= B)(7.5 × 107)÷ (8.566 × 105)= C)(3.45 × 10-9)+ (0.326 × 10-9)=

Which of the following combinations represents only halogens? I. O II. He III. I IV. Br

Identify the number of particles of each element in the following compounds: A)H2O2 - hydrogen peroxide B)C6H12O6 - glucose C)CaCO3 - chalk

Which of the following is a pure substance?

Convert 152 miles into kilometers, using proper significant figures, given that 1 mile = 1.609 km.

What is the coefficient for O2 when this equation is balanced with the lowest whole number coefficients? C2H6 + O2 ? CO2 + H2O

What is the total of all the coefficients when the following equation is balanced with the lowest whole number coefficients? N2H4 + H2O2 ? N2 + H2O

Calculate the following percentages. A)30% of 300 B)7.5% of 4.0 × 105 C)0.50% of 0.060

Write the numerical value for 56,000 ÷ 7.89 with the correct number of significant figures:

Selenium is a nonmetal.

Calculate the densities of the following objects. in g/mL A)A mass of 86 g and a volume of 95 mL. B)A mass of 1.6 kg and a volume of 1.3 L C)A mass of 17 kg and a volume of 850 mL D)A mass of 870 g and a volume of 25 dL E)A mass of 45 mg and a volume of 45 μL

How many O atoms are in the formula unit GaO(NO3)2?

Round the following number to 2 significant figures: 105,006

What is the total dose required for a 140 lb patient if the amount required is 28 mg/kg bodyweight?

Using Table 1.4 in the text, determine which of these substances would show the largest temperature increase, if equal masses of each were heated with the same quantity of energy.

Kinetic energy is stored energy.

How many H atoms are in the molecule C6H3(C3H7)2(C2H5)?

Atoms and Radioactivity

Compounds - Putting Particles Together

Introduction to Organic Compounds

Chemical Reactions

Carbohydrates - Lifes Sweet Molecules

Whats the Attraction State Changes, Solubility, and Lipids

Solution Chemistry: How Sweet Is Your Tea

Acids, Bases, and Buffers in the Body

Proteins - Workers of the Cell

Nucleic Acids - Big Molecules With a Big Role

Food As Fuel - A Metabolic Overview

Filters

Which of the following combinations represents compounds rather than elements? I. O₃ II. CCl₄ III. S₈ IV. H₂O

Perform the following mathematical operations. Give the answer with the proper number of significant figures. A)(2.45 × 10⁵)(5.6 × 10⁴)= B)(7.5 × 10⁷)÷ (8.566 × 10⁵)= C)(3.45 × 10^-9)+ (0.326 × 10^-9)=

Identify the number of particles of each element in the following compounds: A)H₂O₂ - hydrogen peroxide B)C₆H₁₂O₆ - glucose C)CaCO₃ - chalk

What is the coefficient for O₂ when this equation is balanced with the lowest whole number coefficients? C₂H₆ + O₂ ? CO₂ + H₂O

What is the total of all the coefficients when the following equation is balanced with the lowest whole number coefficients? N₂H₄ + H₂O₂ ? N₂ + H₂O

Calculate the following percentages. A)30% of 300 B)7.5% of 4.0 × 10⁵ C)0.50% of 0.060

How many O atoms are in the formula unit GaO(NO₃)₂?

How many H atoms are in the molecule C₆H₃(C₃H₇)₂(C₂H₅)?