Physical Science Final Exam
the subatomic particles located in the nucleus with no overall charges are
neutrons
which of the following polyatomic ions has the same charge as the hydroxide ion?
nitrate
what atom is characteristic of an amine
nitrogen
all atoms of a given element have the same
number of protons
what is the relationship between amu and the gram
one gram is always greater than one amu
the average speed of a horse that gallops a distance of 10km in a time of 30 min is
20 km/h
an object travels 150m in 7.330 sec. Its speed to should be expressed to how many significant figures?
3
what volume of a liquid with a density of 0.50 g/mL has a mass of 15g?
30 mL
a TV set is pushed a distance of 2m with a force of 20N that is in the same direction as the set moves. How much work is done on the set?
40 J
there are _____ electrons, _______ protons, _______ neutrons in an atom of 132 XE 54
54,54,78
an object is pulled northward with a force of 10N and southward force of 15N. The magnitude of the net force on the object is
5N
if a car increases its velocity from zero to 60 km/h in 10s, its acceleration is
6 km/h/s
a 4 kg ball has a momentum of 12 kgxm/s. what is the ball's speed?
6 m/s
given the following generic chemical reaction, which is the product? x->y
Y is the product
of the following, the smallest and lightest subatomic particle is the
electron
triglycerides result when glycerin bonds to three
fatty acids
whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to
follow a straight path
the maximum number of bonds carbon can form is
four
When a car is braked to a stop, its kinetic energy is transformed to
heat
what is the molar concentration of a solution containing 0.5 moles of NaCl in 250 mL of solution
2.0
how many moles of water,H2O, are produced from the reaction of 1.0 moles methane, CH4, with an unlimited supply of oxygen, O2? How many grams of H2O is this?
2.0 moles of water, which is 36 grams
the wavelength of light that has a frequency of 1.20 x 10^13 s-1 is ____ m
2.50 x 10^-5
a car has a mass of 1000kg and accelerates at 2 m/s/s. What is the magnitude of the force exerted on the car?
2000N
the mass % of C in methane (CH4) is
25.13
a car accelerates from rest at 2 m/s/s. What is its speed 3s after the car starts moving
6 m/s
the weight of 0.6kg of salami is about
6.0 N
how much energy is required to increase the temperature of 5.0g of Al by 7.p degrees celsius? (The specific heat of Al is on the board)
7.7 Cal
The energy of a photon of light is __________ proportional to its frequency and __________ proportional to its wavelength.
directly, inversely
an acid is a chemical that
donates hydrogen ions
In the Bohr model of the atom
electron energies are quantized
which of the following is a strong acid
hydrochloric acid
Elements ________ exhibit similar physical and chemical properties.
in the same group of the periodic table
what is the main difference between an ionic and a covalent bond?
one is sharing of a pair of electrons, and the other is the transfer of at least one electron
how many moles of water are there in 18 grams?
one mole
the valence shell is the
outermost shell of electrons in an atom
what is the name for the following polyatomic ion? PO4-3
phosphate
the name of PCl3 is
phosphorus trichloride
an atom loses an electron to another atom. Is this an example of a physical or chemical change
physical change involving formation of positive ions
the correct name for N2O5 is
dinitrogen pentoxide
the formula for the compound formed between aluminum ions and phosphate ions is
AlPO4
which of the following bonds would be the least polar?
C-H
formula used for stick structures
Cn+Hn2+2
which of the following compounds is copper(I) chloride?
CuCl
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is
0 N
a 22.9 g sample of iron absorbs 155J of heat, upon which the temperature of the sample increases from 23.9 degrees Celsius to 38.9 degree Celsius. What is the specific heat of iron?
0.451 J/g-K
if the volume of a 1.0M solution is doubled by dilution, what is the molar concentration of the diluted solution
0.5
starting from rest, the distance a freely falling object will fall in 0.5s is about
1.25m
what is the frequency (s-1) of the electromagnetic radiation that has a wavelength of 2.3m
1.3x 10^8 s-1
a 1-kg mass at the earth's surface weighs about
10N
the formula of nitrobenzene is C6H5NO2. The molecular weight of this compound is ____ amu
123.11
Which pair of atoms constitutes a pair of isotopes of the same element?
14X 12X 6 6
the mass of a pet turtle that weighs 10N is about
1kg
what type of bond links amino acids in a protein
amide bond
which of the following statements is untrue about oxidation and reduction processes?
an oxidation can happen without a reduction
what is an organic compound
any compound isolated from living organisms
the units of specific heat are
cal/g-K or cal/g-celcius
which of the following statements about catalyst is true?
can be used to speed up slow reactions, alters the rate of a chemical reaction, can be consumed in a reaction as long as it is regenerated, catalyst do no change the energy of the reactants or the products
a cannon recoils from firing a cannonball. The speed of the cannon's recoil is small because the
cannon has more mass than the ball
an aromatic hydrocarbon
contains a benzene ring
exert 100 J in 50s and your power output is
2 W
which of the following is the correct electron-dot structure of chlorine (atomic # 17)
2 dots on top bottom and right- CL middle- 1 dot on left
balance the following chemical equation. ____ N2+ _____ H2 --> _____NH3
1,3,2
which is greater: 1.01 amu of hydrogen or 1.01 grams of hydrogen
1.01 grams of hydrogen is greater than 1.01 amu of hydrogen
a hydrocarbon is
Generally clear colorless to dark brown colored liquids with a characteristic odor.
which of the following molecules contains a polar bond
H-F
Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?
I, Br
which of the following elements has six valence electrons?
O
which of the following best describes ionic bonding
One atom gains electrons while the other atoms loses an electron and an electrostatic force attracts them.
which of the following elements will most likely form an ion with -2 charge
S
which of the following compounds would you expect to be ionic?
SrCl2
which of the following solutions is the most acidic
a solution with a PH=4
If you had 1 mole of marbles, how many marbles would you have?
a very large number
It takes 6s for a stone to fall to the bottom of a mineshaft. How deep is the shaft?
about 180m
what needs to be done to convert a neutral nitrogen atom into an N-3 species
add three electrons
which one of the following is an endothermic process?
boiling soup and ice melting
amides and carboxylic acids are related in that they
both contain a carbon-oxygen double bond
the correct name for MgF2 is
magnesium fluoride
a kilogram is a measure of an object's
mass
salicylic acid is from
milo
an object that has kinetic energy must be
moving
what color of visible light has the longest wavelength
red
aspirin was derived from which natural product
salicylic acid
a moving object has
speed, velocity, energy, and momentum.
which has greater kinetic energy, a car traveling at 30 km/h or a car of half the mass traveling at 60 km/h
the 60 km/h car
two structural isomers differ from each other by
the connectivity of atoms
your weight is
the gravitational attraction between you and the earth
what is oxidation?
the loss of electrons
an object is raised above the ground gaining a certain amount of potential energy. If the same object is raised twice as high, it gains
twice as much potential energy
a neutral oxygen atom in a molecule has how many bonds
two
of the following _____ radiation has the longest wavelength and ______ radiation has the greatest energy
visible, gamma
which one of the is correct?
wavelength (uspside down y) = c v
how many covalent bonds would the following generic atom usually form? X and two dots on all sides
would not usually form any covalent bonds
the force required to maintain at a constant velocity in free space is equal to
zero
the formula of ammonium carbonate is
(NH4)2CO3
if a neutral atom loses one electron, what is the electrical charge of the atom
-1
a 30 kg and a 25 kg boy face each other on friction free roller blades. the girl pushes the boy, who moves away at a speed of 1.0 m/s. the girl's speed is
0.83 m/s
how many different isomers are possible for a hydrocarbon with the molecular formula C3H8
1
for the following acid-base reaction, identify which salt is formed? HCL+NaOH = ???? + H2O
NaCl
