final exam review for tw

FINAL E

XAM

REVIEW

CL I C

K E R E

DI T

I ON

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1. You can identify a metal by carefully determining its density. A 33.39 g sample of an unknown metal is 1.50 cm long, 2.50 cm wide, and 1.00 cm thick. What is a possible identity of the element?

A. nickel, 8.0 g/cm3

B. aluminum, 2.70 g/cm3

C. silver, 10.5 g/cm3

Question #1

Which of the following observations is/are examples of physical change?

A. hydrogen gas is evolved when zinc reacts with hydrochloric acidB. Aluminum melts when heated above 660°C C. The density of water decreases when it solidifies.

Question #2

Which of the following observations is/are examples of physical change?

A. hydrogen gas is evolved when zinc reacts with hydrochloric acid

B. Aluminum melts when heated above 660°C

C. The density of water decreases when it solidifies.

Question #2

Ethanol boils at 351.7 K. What is this temperature in Celsius?

Question #3

Ethanol boils at 351.7 K. What is this temperature in Celsius?

Question #3

78.7 oC

Question #4

An electronic balance is used to determine that a sample has a mass of 5.8234 g. How many significant figures does this measurement have?

Question #4

An electronic balance is used to determine that a sample has a mass of 5.8234 g. How many significant figures does this measurement have?

5

Question #5

What is the correct answer to the following expression:

(86.11 – 85.49) / 28.26A. 2 × 10-2

B. 2.2 × 10-2

C. 2.19 × 10-2

D. 2.194 × 10-2

E. 2.1939 × 10-2

Question #6

Question #7

A sulfide ion has ____ electrons.

Question #7

A sulfide ion has ____ electrons.18

Question #8

What is the charge on the copper ion in Cu3N?

Question #8

What is the charge on the copper ion in Cu3N?

3

Question #9

What is the correct formula for iron(III) bromide?

A. FeBrB. FeBr3

C. Fe2Br3

D. Fe3Br2

E. Fe3Br

Question #10

Calculate the number of moles in 0.093 g Zn.

Question #10

Calculate the number of moles in 0.093 g Zn.

0.0014 mol

Question #11

How many hydrogen atoms are in 1.0 g of CH4?

A.6.2 × 10-2 atomsB.2.5 × 10-1 atomsC.3.8 × 1022 atomsD.1.5 × 1023 atomsE.3.9 × 1025 atoms

Question #12

Identify reaction type: Cu + AgNO3 Cu(NO3)2 + Ag

A. CombustionB. Single replacementC. Double replacementD. SynthesisE. Decomposition

Question #13

Identify reaction type: 2 C8H18 + 25 O2 16 CO2 + 18 H2O


Question #14

Identify reaction type: 4Ag + O2 2Ag2O


Question #15

Write a balanced equation for the double displacement reaction between aluminum nitrate and potassium phosphate.

What is the sum of the coefficients?

Question #15

Write a balanced equation for the double displacement reaction between aluminum nitrate and potassium phosphate.

What is the sum of the coefficients?6

Question #16

Aluminum reacts with oxygen to produce aluminum oxide.

4 Al(s) + 3 O2(g) 2Al2O3(s)

If 4.0 moles of Al react with excess O2, how many moles of product can be formed?

Question #16

Aluminum reacts with oxygen to produce aluminum oxide.

4 Al(s) + 3 O2(g) 2Al2O3(s)

If 4.0 moles of Al react with excess O2, how many moles of product can be formed? 2.0 mol

Question #17

What mass of water is produced by the complete combustion of 6.21 g of hexane, C6H14 (can assume O2 in xs)?

A.0.186 gB.1.60 gC.9.09 gD.43.5 gE.208 g

Question #18

How many moles of Cu2O can be produced from the reaction of 0.66 mol Cu with 0.40 mol O2?

Question #18

How many moles of Cu2O can be produced from the reaction of 0.66 mol Cu with 0.40 mol O2?

0.33 mol

Question #19

At constant temperature, 12.5 L of a gas at 262 mm Hg is compressed to 4.15 L. What is the final pressure of the gas?

Question #19

At constant temperature, 12.5 L of a gas at 262 mm Hg is compressed to 4.15 L. What is the final pressure of the gas?

789 mm Hg

Question #20

A 48.0 L gas cylinder contains 498 g H2 at 25°C. What is the pressure (in atm) inside the cylinder?

(R = 0.0821 L*atm/mol*K)

Question #20

A 48.0 L gas cylinder contains 498 g H2 at 25°C. What is the pressure (in atm) inside the cylinder?

(R = 0.0821 L*atm/mol*K)

125 atm

Question #21

The correct name for LiCl isA. lithium monochlorideB. lithium(I) chlorideC. monolithium chlorideD. lithium chlorideE. monolithium monochloride

Question #22

The correct name for FeO isA. iron oxideB. iron(II) oxideC. iron(III) oxideD. iron monoxideE. iron(I) oxide

Question #23

What is the subscript of barium in the formula barium sulfate?

Question #23

What is the subscript of barium in the formula barium sulfate?

1

Question #24

What is the molar mass of cryolite (Na3AlF6)?A. 209.9 g/molB. 185.3 g/molC. 210.0 g/molD. 104.2 g/molE. 68.97 g/mol

Question #25

Which of the following would represent the greatest pressure?A. 0.713 atmB. 345 mm HgC. 12.0 psiD. 58486 Pa

final exam review for tw

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reaction type

mol o2

g sample

excess o2

g of hexane

g of ch4

hydrogen gas

gas cylinder