Chemistry Final

methane

1

number of valence electrons. Li

1

number of valence electrons. Na

1

A solution with a pH of 9 has a OH concentration of

1.0 x 10^-9 mol/L

Find the pH of a solution that contains 3.15 grams of nitrous acid (HNO2) dissolved in .750 L of water.

1.05 acid

decane

10

How much carbon dioxide from the atmosphere is absorbed by the oceans on a daily basis?

10 million

What is the pH of a solution in which the H 1 x 10^12

12.0

A natural element wit 17 electrons has how many protons?

17 protons

ethane

2

number of valence electrons. Be

2

What is the pH of a 0.01 M hydrochloric acid solution

2.0 acidic

how many molecules are in 4.50 moles of H20.

2.79 x 10^24

number of valence electrons. B

3

propane

3

how many hydrogen atoms are in 4 molecules of isoprpyl alcohol, C3H8O

32 hydrogen atoms

the molar mass of diatomic oxygen is

32g

the chemical formula of aspirin is C9, H8,O4 . what is the mass of 0.200 mol of aspirin.

36 grams

atoms of Ca and S would be expected to react in a ratio of

3:1

What is the pH of a solution in question 1?

4

butane

4

how many single covalent bond are there in a molecule of CH4

4

an atom of an element with atomic number 48 and mass number 120 contains

48 protons and neutrons, 22 electrons

pentane

5

hexane

6

number of valence electrons. O

6

what is the percent by mass of carbon in acetone, C3 H6 O

62 %

heptane

7

number of valence electrons. Kr

8

octane

8

nonane

9

A solution in which the H is 1.0 x 10^4 mol/L is said to be

Acidic

Less than 1.0 x 10^-7 M

Acidic

Boron

B

Greater than 1.0 x 10^-7 M

Basic

Carbon

C

the chemical formula for the iconic compound formed when elements of Ca and N react is

Ca3N2

The formula of the hydrogen ion is often written as

H+

Potassium

K

Sodium

Na

1.0 x 10^-7 M

Neutral

Oxygen

O

Sulfur

S

What sequence of numbers balances the following equation. ___N2+____H2= NH3

_1__N2+___3_H2= 2 NH3

What sequence of numbers balances the following equation. ___N2+____O2= N2O

_2_N2+___1_O2= 2 N2O

What sequence of numbers balances the following equation. ___H2+____O2= H20

_2__H2+__1__O2= 2___H20

A solution in which the hydroxide ion concentration is 1 x 10^5 M is

acid

A(n) --------- solution is on which H+ is greater than OH-

acidic

pH 2.0

acidic

the diatomic molecule among the following that contains a triple covalent bond is

anything in column nitrogen

A(n) --------- solution is on which H+ is less than OH-

basic

The ocean has an approximate of pH of 8.2. What does this number mean in terms of acidity?

basic

pH 10.0

basic

what is the name of the following compound ? C4H10

butane

How are coral reefs affected by Ocean acidification?

can not form shells

What is the chemical reaction responsible for the oceans becoming more acidic?

carbon oxide + water = carbon acid

What molecule is formed when CO2 mixes with water.

carbonic acid

covalent bond is

chemical bond that involves sharing of electron pairs between atoms

in forming the molecule HF, the F atom attains the electron configuration of

chlorine Cl

the element with 6 valence electrons is

column 16

What is a hydrocarbon

compound of hydrogen and carbon

With solutions of strong acids and strong bases, the word strong refers to

degree of ionization

the variable that is the result of an experiment is called the

dependent

Valence electrons are

electrons located in outermost shell

In a neutral solution, the H is

equal to OH-

state of any matter that takes both the shape and volume of a container

gas

Metals typically are

good conductors of electrical currents

Calculate the H+ concentration if the pH is 12.627. Calculate the OH concentration if the pH is 3.58.

h+= 4.24 x 10^12 - OH = 10^(-10.46)=3.801 X 10^-11

____ mixture is one that is not uniform in composition

heterogeneous

a ____ mixture is one that has a completely uniform composition.

homogeneous

how do the isotopes hydrogen -2 and -3 differ?

hydrogen -2 has 1 proton and neutron, hydrogen 3 has 2 neutrons and 1 proton

What does a water molecule that gains a hydrogen ion become.

hydronium

What does a water molecule that loses a hydrogen ion become.

hydroxide ion

Ocean acidification is caused by

increasing carbon dioxide emission

the variable that is changed in an experiment is called the

independent variable

what type of bond is between a metal and nonmetal

ionic bond

The state of any matter that has definite volume, but takes the shape of a container. Particles are less rigidly packed but they tend to expand when heated

liquid

valence electrons are

located in outermost shell in an atom

in general, metals react by

losing valence electrons

the nucleus of an atom is

made up of protons and neutrons

the sum of the protons and neutrons in an atom equals the

mass number

chemistry is the study of

matter

pH 7.0

neutral

What does the reaction of an (equally opposite) acid with a (equally opposite) base produce?

neutral solution

what is the name of the following compound ? C9H20

nonane

all atoms of the same element have the same

number of protons

the chemical properties of an element are largely determined by its

number of valence electrons

Because of ocean acidification, the price of which of the following foods is most likely to increase?

oysters, shell fish

the --- of a solution is the negative logarithm of the hydrogen ion concentration

pH

How are oyster larvae affected by ocean acidification?

pH of ocean is too acidic, causes larvae to grow deformed

Which element has 19 protons?

potassium

what is the name of the following compound ? C3H8

propane

The state of any mater that has a definite shape and volume. The particles are packed rigidly and are incompressible.

solid

Chemicals in the air can combine with rain to produce acid rain, which is harmful to the environment. Which of these is most likely to be the pH of acid rain.

somewhere around 4

the number of neutrons in the nucleus of an atom can be calculated by

subtracting mass number from atomic number

the polar molecule among the following is

symetrical

Matter is anything that has mass and

takes up spaces

Which of the following is true about indicators

tells you pH of acid or base

atoms share electrons in order to acquire the electron configuration

the noble gases

a pH of 7 is____ than a pH of 8

the same acidity (pH of 7 is not acidic)

the law of conservation of matter states

total energy of an isolated systems remains constant

all the elements in a particular group of the periodic table have the same number of

valence electrons

which of the following contains a polar covalent bond?

water