Chem Final Flashcards by Sinead Zoellner

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

Air

How well did you know this?

Not at all

Perfectly

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

Melting of an ice cube

How well did you know this?

Not at all

Perfectly

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

Milligrams per deciliter

How well did you know this?

Not at all

Perfectly

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

How well did you know this?

Not at all

Perfectly

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

89.5 kg

How well did you know this?

Not at all

Perfectly

Which element is non metal?

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

How well did you know this?

Not at all

Perfectly

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

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

How well did you know this?

Not at all

Perfectly

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

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

How well did you know this?

Not at all

Perfectly

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

Si-28

How well did you know this?

Not at all

Perfectly

Which element is a transition metal in period 4?

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

How well did you know this?

Not at all

Perfectly

Which element is a noble gas?

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

How well did you know this?

Not at all

Perfectly

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

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

146

How well did you know this?

Not at all

Perfectly

Which element is chemically similar to chlorine?

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

Bromine

How well did you know this?

Not at all

Perfectly

The proper electron dot symbol for aluminum is?

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

.Al.

How well did you know this?

Not at all

Perfectly

Protons and electrons reside in the nucleus of an atom?

False

How well did you know this?

Not at all

Perfectly

The electron configuration for calcium is ?

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

How well did you know this?

Not at all

Perfectly

Which is not an ionic compound?

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

CBr4

How well did you know this?

Not at all

Perfectly

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

Anions

How well did you know this?

Not at all

Perfectly

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

Ca^2+

How well did you know this?

Not at all

Perfectly

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

KBr

How well did you know this?

Not at all

Perfectly

What is the formula for the ionic compound lithium oxide?

Li2O

How well did you know this?

Not at all

Perfectly

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

Al2S3

How well did you know this?

Not at all

Perfectly

What is the proper name for CuCl?

Copper (I) chloride

How well did you know this?

Not at all

Perfectly

What is the proper name for MgF2?

Magnesium Fluoride

How well did you know this?

Not at all

Perfectly

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

Ammonium sulfate

What is the correct name for AuI3?

Gold (III) iodide

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

Which bond is most polar? ``` A. C-N B. C-C C. C-O D. C-Cl E. C-F ```

C-F

What is the correct chemical formula for selenium dioxide?

SeO2

What is the correct chemical formula for dinitrogen tetroxide?

N2O4

What is the formula weight of KCl?

74.55 amu

What is the mass of 3.81 lol of PH3?

130 g

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

4.79 mol of CO2

Catalysts accelerate a reaction by?

Lowering the energy of activation.

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

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

For an endothermic reaction at equilibrium, increasing the temperature...

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

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.

True

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.

False

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?

True

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?

.25atm

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?

.477L

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?

163 L

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.

True

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.

One-half

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

3.7*10^2 L

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

Which element is not a common heteroatom in organic compounds? ``` A. F B. Cl C. O D. Na E. N ```

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

What is the IUPAC name for CH3CH2CH2CH2CH2CH3?

Hexane

Which compounds are aldehydes?

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.

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?

6.25

What is the symbol for a beta particle?

0/-1 e

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

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

Amine

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

102 149 251

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

2,2

Which formula represents an inorganic compound? A. ClCCCl B. CaCl2 C. CH3CO2CH2CH3 D. CH3NHCH2CH3

CaCl2

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

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

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

Ester

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 ```

2.00L of a .75M Ca(NO3)2 The highest formula weight

An Arrhenius Acid is?

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

Which type of radiation has the largest mass?

An alpha particle

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

Ether

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)

.218M HCl

A bronsted Lowry Acid is...

A compound that is a proton donor

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

2.70 M NaCl

Which type of compounds are saturated hydrocarbons?

Alkanes

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

Which compound is a weak acid? A. CH3COOH B. H2SO4 C. HNO3 D. HBr

CH3COOH

Chem Final Flashcards

(69 cards)