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Chem Final Flashcards

1
Q 
Which is not an example of a pure substance?
A. Water
B. A block of dry ice
C. Aluminum foil
D. Sugar
E. Air
A

Air

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2
Q

Which is an example of a physical change?
A. Polishing tarnished silver
B. Melting an ice cube in a glass of soda
C. Burning propane
D. Rusting of an iron nail
E. Baking cookies

A

Melting of an ice cube

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3
Q 
For a person between the ages of 10 and 29 the normal range of blood triglycerides is 53 x 10^4 mg/dL. What is the correct interpretation of the units in this measurement?
A. Micrograms per deciliter
B. Milligrams times deciliter 
C. Megagrams per deciliter
D. Milligrams per deciliter
A

Milligrams per deciliter

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4
Q 
Which is the proper conversion factor for converting a mass expressed in pounds to the same mass expressed in grams?
A. 1g/454lb
B. 454g/1lb
C. 1lb/ 454g
D. 454lb/ 1g
A

B

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5
Q 
What is the mass in kilograms of an individual who weighs 197lb?
A. 8.95 kg
B. 197 kg
C. 89.5 kg
D. 99 kg
E. 433 kg
A

89.5 kg

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6
Q

Which element is non metal?

A. Co
B. Al
C. Br
D. K

A

Br

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7
Q

What is the mass number of the isotope with the symbol 37/27 Cl?

A. 18
B. 37
C. 17
D. 35.45

A

37

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8
Q

What is the atomic number of the isotope with the symbol 37/17 Cl?

A. 17
B. 35.45
C. 18
D. 37

A

17

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9
Q

Silicon has 3 naturally occurring isotopes: Si-28, Si-29 and Si-30. If the average atomic mass of silicon is 28.09, which isotope has the highest isotopic abundance?

A. All isotopes have the same abundance
B. Si-29
C. Si- 30
D. Si-28

A

Si-28

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10
Q

Which element is a transition metal in period 4?

A. Sn
B. Sc
C. Hf
D. K

A

Sc

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11
Q

Which element is a noble gas?

A. Ra
B. H
C. More than one of the elements listed is a noble gas
D. Ne

A

Ne

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12
Q

How many neutrons are in the isotope 238/92 U?

A. 92
B. 146
C. 238
D. 330

A

146

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13
Q

Which element is chemically similar to chlorine?

A. Oxygen
B. Sulfur
C. Argon
D. Calcium
E. Bromine
A

Bromine

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14
Q

The proper electron dot symbol for aluminum is?

A. .Al
B. ..
   .Al
C.   Al.
D.    .
     .Al.
A

.

.Al.

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15
Q

Protons and electrons reside in the nucleus of an atom?

A

False

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16
Q

The electron configuration for calcium is ?

A

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

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17
Q

Which is not an ionic compound?

A. CBr4
B. Ca(NO3)2
C. KCl
D. AlBr3

A

CBr4

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18
Q

____ are negatively charged ions that have ____ electrons than protons.

A

Anions

More

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19
Q

What is the ion symbol for an atom with 20 protons and eighteen electrons?

A

Ca^2+

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20
Q

What is the formula for the ionic compound formed when potassium and bromine combine?

A

KBr

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21
Q

What is the formula for the ionic compound lithium oxide?

A

Li2O

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22
Q

What is the formula for the ionic compound formed when aluminum and sulfur combine?

A

Al2S3

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23
Q

What is the proper name for CuCl?

A

Copper (I) chloride

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24
Q

What is the proper name for MgF2?

A

Magnesium Fluoride

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25
Q

What is the name of the compound (NH4)2SO4?

A

Ammonium sulfate

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26
Q

What is the correct name for AuI3?

A

Gold (III) iodide

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27
Q

How many lone pairs of electrons are present in the Lewis structure of Smi is NH3?

A

1

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28
Q

Which bond is most polar?

A. C-N
B. C-C
C. C-O
D. C-Cl
E. C-F
29
Q

What is the correct chemical formula for selenium dioxide?

30
Q

What is the correct chemical formula for dinitrogen tetroxide?

31
Q

What is the formula weight of KCl?

32
Q

What is the mass of 3.81 lol of PH3?

33
Q

How many moles of carbons dioxide are in 211 g of carbons dioxide?

A

4.79 mol of CO2

34
Q

Catalysts accelerate a reaction by?

A

Lowering the energy of activation.

35
Q

When the pressure of a reaction at equilibrium decreases, which direction does the equilibrium shift?

A

The equilibrium shifts in the direction that increases the number of moles of gas.

36
Q

For an endothermic reaction at equilibrium, increasing the temperature…

A

Increases the rate of the forward reaction to form more products.

37
Q

Consider the following reversible reaction at equilibrium CO(g) + Cl2(g) = COCl2(g). If chlorine gas is added to the reaction vessel the equilibrium will shift to the right.

38
Q

Consider the following reversible reaction at equilibrium CO(g) + Cl2(g) = COCl2(g). If the pressure inside the reaction vessel is increased, the equilibrium will shift to the left.

39
Q

Consider the following reversible reaction at equilibrium CO(g) + Cl2(g) = COCl2(g), where H = -108.6 kJ. When the temperature of the reaction of the vessel decreases the system responds by forming more COCl?

40
Q

A simple neon gas has a volume of 5.0mL at a pressure of 1.50 atm. What is the pressure exerted by the gas if the volume is increased to 30mL at a constant temperature?

41
Q

A balloon contains .500 L of helium at 25 degrees C is cooled to 11 degrees at a constant pressure. What volume does the balloon now occupy?

42
Q

A 54.2 L sample of gas at 115 K is heated to 345 K at constant pressure. What volume does the gas now occupy?

43
Q

The pressure of a gas is proportional to its Kelvin temperature at constant volume and number of moles. Therefore increasing the temperature increases the pressure.

44
Q

If you have equal masses of two different substances (A and B) and the density of A is twice the density of B then the volume of A is _____ the volume of B.

45
Q

Air has a density of .001226g/mL. What volume of air would have a mass of 1.0lb?

A

3.7*10^2 L

46
Q

What is the charge on the chromium ion in the ionic compound CrCl3?

47
Q

Which element is not a common heteroatom in organic compounds?

A. F
B. Cl
C. O
D. Na 
E. N
48
Q

How many covalent bonds does carbon generally form in organic compounds?

49
Q

What is the IUPAC name for CH3CH2CH2CH2CH2CH3?

50
Q

Which compounds are aldehydes?

A

A carbon atom shares the following bonds:
A double bond with an oxygen atom
A single bond with a hydrogen atom
A single bond with another atom or group of atoms.

51
Q

If the half life of phosphorus-32 is 14.3 days, how much of a 200 mg sample of phosphorus-32 remains after 71.5 days?

52
Q

What is the symbol for a beta particle?

53
Q

Phosphorus-32 is used for organ imaging. How many neutrons are present in this radioisotope?

54
Q

This type of compound contains a functional group that contains a nitrogen atom with a lone pair.

55
Q

What are the number of protons, the number of neutrons, and the mass number of the radioisotopes 251/102No.?

56
Q

An alpha particle is a high energy particle that contains ___ protons and ____ neutrons.

57
Q

Which formula represents an inorganic compound?

A. ClCCCl
B. CaCl2
C. CH3CO2CH2CH3
D. CH3NHCH2CH3

58
Q

A sample of urine has a pH of 8.2. Which statement describing the urine sample is not true?

A. The urine sample has a hydronium ion concentration greater than that of a neutral solution.
B. The urine sample has a Hydroxide ion concentration greater than its hydronium ion concentration.
C. The urine sample has Hydroxide ion concentration greater than 1.0x10^-7
D. The urine sample is basic

A

The urine sample has a hydronium ion concentration greater than that of a neutral solution.

59
Q

This type of compound has at least 1 -OH group replaced by an -O alkyl group.

60
Q

Which solution has the greatest mass of solute?

A. All of the solutions have the same mass of solute. 
B. 2.00 L of a .75 M Ca(NO3)2 solution
C. 2.00 L of a .75M CaCl2 solution
D. 2.00 L of a .75M NaCl solution
E. 2.00 L of a .75M Na2CO3 solution
A

2.00L of a .75M Ca(NO3)2

The highest formula weight

61
Q

An Arrhenius Acid is?

A

A compound that contains a hydrogen atom and dissolved in water to form a hydrogen ion H+

62
Q

Which type of radiation has the largest mass?

A

An alpha particle

63
Q

This type of compound has an oxygen atom bonded to two alkyl or aryl group.
R-O-R

64
Q

What is the molarity of an HCl solution if 43.6 mL of a 0.125M KOH solution are needed to titrate a 25.0mL sample of the Acid according to the equation below?

KOH(aq) + HCl(aq) —— H2O(l)+KCl(aq)

65
Q

A bronsted Lowry Acid is…

A

A compound that is a proton donor

66
Q

What is the molarity of a solution made by dissolving 36.29g of NaCl in 2.30 L of solution?

A

2.70 M NaCl

67
Q

Which type of compounds are saturated hydrocarbons?

68
Q

How many covalent bonds does nitrogen typically form in organic compounds?

69
Q

Which compound is a weak acid?

A. CH3COOH
B. H2SO4
C. HNO3
D. HBr

CHE 1111 (9 decks)

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