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True/False
The temp of a gas is inversely proportional to its pressure

false

True/False
The volume of a gas is directly proportional to the pressure in torr

False

True/False
The pressure of a gas is due to collisions of gas molecules

True

Divers often inflate heavy duty balloons attached to salvage items on the sea floor. If a balloon is filled to a volume of 3.00L at a pressure of 2.50 atm, what is the volume of the balloon when it reaches the surface?

7.50 L

If the volume of a gas container at 32.0 C changes from 1.55L to 755mL, what will the final temperature be?

-124 C

What is the temperature (in C) of 2.48 moles of gas stored in a 30.0L container at 1559 mm Hg?

29

What is the major component of the air we breathe?

nitrogen

Which state of matter has a low density and is not easily compressed?
- liquids
- gases
- solids
- both solids and liquids
- none of the above

none of the above

Increasing the intermolecular forces of a liquid will do which of the following?
- increase the surface tension
- decrease the vapor pressure
- decrease the evaporation rate
- increase the viscosity
- all of the above

all of the above

The rate of vaporization of a liquid can be increased by?

increasing the surface area and increasing the temperature

How many kilojoules of heat are needed to completely vaporize 42.8 grams of C4H10O at its boilng point?
Given: change in Hvap= 26.5 kJ/mol

15.3

How much energy does it take to melt a 16.87 g ice cube?
change in Hfus= 6.02 kJ/mol

5.64 kJ

If the solubility of sodium chloride is 36 grmns per 100 grams of water, which of the following solutions would be considered unsaturated?

5.8 moles of NaCl dissolved in 1 L of water

Which of the following compounds is a strong electrolyte?
- HCl
- NaC2H3O2
- NaCl
- NH4Cl
- all of the above

all of the above

A solution contains 100.0 g water, 10.0 g NaCl, and 15.0 g methanol. What is the weight percent of methanol in the solution?

12.0%

You need to prepare 2.00 L of 0.100 M Na2CO3 solution. The best procedure is weigh out :

21.2 g Na2CO3 and add water until the final solution has a volume of 2.00 L

How many grams of LiF would be present in 575 mL of 0.750 M LiF solution?

11.2

The Bronsted-Lowry definition of a base is:

a proton acceptor

WHich of the following is not an acid-base conjugate pair?
- H2CO3 and HCO3-
- NH4+ and NH3
- H2O and OH-
- H2S and OH-

H2S and OH-

What are the products of a neutralization reaction?

water and salt

A 25.0 mL sample of 0.105 M HCl was titrated with 31.5 mL of NaOH. What is the concentration of the NaOH?

0.0833 M

Which of the following acids is a diprotic, weak acid?
- phosphoric acid
- carbonic acid
- sulfuric acid
- hydrobromic acid

carbonic acid

How many moles of water are made from the reaction of 2.2 moles of oxygen gas?

4.4

Many metals react with halogens to give metal halides. For example
2AL (s) + 3Cl2 (g) yields 2AlCl3 (s)
If you begin with 13.5 g of aluminum, :

you will need 53.2 g Cl2 for complete reaction and will produce 66.7 g of AlCl3

COnsider the following generic chemical equation: 2A +5B yields C+3D
If you react 4 units of A with 10 units of B, which statement is true?

there are equivalent amounts of A and B

The theoretical yield of a reaction is 75.0 grams of product and the actual yield is 42.0 g. What is the percent yield?

56.0

How many grams of calcium phosphate are theoretically produced if we start with 3.40 moles of Ca(NO3)2 and 2.40 moles Li3PO4?
reaction: Ca(NO3)2 + 2Li3PO4 yields 6LiNO3 + Ca3(PO4)2?

351

A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH3. What is the percent yield for this reaction?
Reaction: N2(g) + 3H2(g) yields 2NH3(g)

13.2%

How are wavelength and frequency of light related?

wavelength increases as the frequencu decreases

How many subshells are there in the n=2 principal shell?

2

How many electrons are unpaired in the orbitals of carbon?

2

How many core electrons are in a chlorine atom?

10

Which one of the following species has the electron configuration of 1s2 2s2 2p6?
- Na+
- O2-
- F-

all of them

Which of the following elements ahs the lowest ionization energy?
F, He, C, Rb, Na

Rb

Which of the following atoms is the smallest?
B, Li, Be, O, Ne

Ne

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How many valence electrons are in the nitrate ion?

24

What is the correct lewis structure of N2?

:N triple bond N:

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Which of the following is considered a single electron group?
- single bond
- double bond
- triple bond
- all of the above

all of the above

Which of the following compounds would have a linear molecular geometry?
N2
H2S
CO2

N2 and CO2

Which compound listed below will dissolve in water?
SiO2
NH3
CCl4

NH3

What is the oxygen-to-sulfur mass ratio of sulfur dioxide?

1.0

How many of each type of atoms are there in the formula NH4C2H3O2?

N=1
H=7
C=2
O=2

Ammonium fluoride is considered which of the following?

ionic compound

WHat is the formula for an ionic compound made out of barium and nitrogen?

Ba3N2

What is the name of the compound whose formula is Na2O?

sodium oxide

What is the formula mass for diboron tetrachloride?

163.43 amu

How many O atoms are in ammonium acetate?

2

How many O atoms are present in sodium hypochlorite?

1

How many moles of Pb are in 4.71 times 10^21 Pb atoms?

0.000782

You have 10.0 g each of Na, C, Pb, Cu, and Ne. Which contains the smallest number of moles?

Pb

Whcih of the following molecules contain 9.02 times 10 raised 23 atoms?

9/00 g H2O

One mole of (NH4)2HPO4 contains how many moles of hydrogen atoms?

9

How many moles of carbon are in 3.5 moles of calcium carbonate?

3.5

Which of the following is NOT evidence that a chemical reaction has occurred?
- solid formation
- gas formation
- emission of light
- color change
- all are evidence of a chemical reaction

all are evidence of a chemical reaction

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An aqueous solution is:

water with another compound dissolved in it

All of the following compounds are soluble in water EXCEPT:

PbCl2

If you had an aqueous mixture that contained Ag+, K+, and Pb+ cations, how many different solids could precipitate if a chloride solution was added?

2

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What is true of the scientific method?

The scientific method emphasizes observation and experimentation as the way to understand the world

What is an example of a scientific theory?

all matter is compose of small, indestructible particles called atoms

A sample of wood with a mass od 3.0 g was burned in an open dish. The ashes weighed 1.2 grams. What happened to the rest of the wood?

the remaining 1.8 grams was converted into gaseous compounds

The correct scientific notation for the number 0.00050210 is:

5.0210 time 10^-4

The correct number if significant figures in the number 0.027090 is:

5

Determine the answer to the following equations with correct number of significant figures:
(1.103 + 2.03) times 1.02521=?

19.62

the correct prefic for the multiplier 0.000001 is:

micro

How many inches are in 2.80 ft?

33.6

How many low does 81 mg aspirin tablets can be made from 1.21 kg of aspirin?

15,000 tablets

A lead ball has a mass of 55.0 grams and a density of 11.4 g/cm3. What is the volume of the ball?

4.82 mL

A pure substance is:

composed of only one type if atom or molecule

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What is false?

energy is the single main component of the universe

If a particular process is endothermic, the reverse process must be:

exothermic

How many kilojoules are there in 95.0 calories?

397

When 49.5 J of heat is transferred to 7.3 g iron at 22 C, the temperature of the iron increases to 37 C. What is the specific heat of iron in J/g C?

0.45

What is the charge of the Barium ion?

2+

Isotopes are:

atoms of the same element that have a different number of neutrons

How many protons and neutrons are in Cl-37?

17 protons, 17 neutrons

A fictional element has two isotopes, each making up 50% of the population. Isotope 1 has a mass of 80.0 amu, isotope 2 has a mass of 85.0 amu. Calculate the atomic mass of the fictional element.

82.5 amu

Acetate

C2H3O2-

Carbonate

CO3^2-

Bicarbonate or Hydrogen Carbonate

HCO3-

Hydroxide

OH-

Nitrate

NO3-

Nitrite

NO2-

Chromate

CrO4^2-

Dichromate

Cr2O7^2-

Phosphate

PO4^3-

Hydrogen Phosphate

HPO4^2-

Ammonium

NH4+

Hypochlorite

ClO-

Chlorite

ClO2-

Chlorate

ClO3-

Perchlorate

ClO4-

Permanganate

MnO4-

Sulfate

SO4^2-

Sulfite

SO3^2-

Bisulfite or Hydrogen Sulfite

HSO3-

Bisulfate or Hydrogen Sulfate

HSO4-

Peroxide

O2^2-

Cyanide

CN-

________makeup virtually everything we come into contact with.

Chemicals

_______is the science that seeks to understand what matter does by studying what atoms and molecules do.

Chemistry

________ is a way of learning that emphasizes observation and experimentation.

Scientific Method

_______ is a tentative interpretation or explanation of the observations.

Hypothesis

What is the basis for a scientific theory?

One or more well-established hypotheses

__________ is a brief statement that synthesizes past observations and predicts future ones.

Scientific Law

Includes: decimal part, exponential part, and an exponent.

Scientific Notation

1. All nonzero digits are significant 1.05

2. Interior zeros are significant 4.0208

3. Trailing zeros are significant 3.00

4. Leading zeros are insignificant 0.00005

5. Zeros at the end of a number but before the decimal point are ambiguous

Rules of Significant Figures

___________ answer has the same number of significant figures as the factor with the lowest number of significant figures

Multiplying/Dividing Significant Figures

____________answer has the same number of decimal places as the factor with the lowest number of decimal places

Adding/Subtracting Significant Figures

* meter is length

* mass is kilogram

* time is second

* temperature is Kelvin

Standard Units

Tera

(T) 10^12

Giga

(G) 10^9

Mega

(M) 10^6

Kilo

(k) 10^3

Deci

(d) 10^-1

Centi

(c) 10^-2

Milli

(m) 10^-3

Micro

(m) 10^-6

Nano

(n) 10^-9

Pico

(p) 10^-12

Femto

(f) 10^15

D= M/?

V= Volume

(F-32)/1.8=

C

________ is anything that occupies space and has mass

Matter

solid, liquid, and gas

States of Matter

In _________ molecules are closely packed in fixed locations

Solids

________ atoms or molecules are arranged in geometric patterns with long-range; repeating order; salt, diamond

Crystalline

_________ atoms or molecules do not have long-range order; glass, rubber

Amorphous

_________ atoms and molecules are close to each other, but move freely; have a fixed volume; assume shape of container

Liquids

________ atoms or molecules are separated by large distances; move freely; are compressible

Gases

_________ is two or more atoms joined to one another in specific geometric arrangements.

Molecules

______________ is composed of only one type of atom or molecule

Pure Substance

A _________ is composed of two or more different types of atoms and molecules combined in variable proportions

Mixture

An _______ is a substance that cannot be broken down into simpler substances

Element

A _________ is a substance composed of two or more elements in fixed, definite proportions

Compound

A _________ composition varies from one region to another

Heterogeneous Mixture

A ___________ composition is the same throughout

Homogeneous Mixture

Things that a substance displays without changing its composition.

Physical Properties

Things that a substance displays only through changing its composition

Chemical Properties

__________ is when matter changes its appearance but not its composition; ex: when ice melt

Physical change

___________ is when matter changes its composition; ex: copper turns green upon continuous exposure to air

Chemical change

What is the act of carefully pouring off; ex: oil into another container?

Decanting

__________ is the process in which the mixture is heated to boil off the volatile (easily vaporizable) liquid

Distillation

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