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
