Chemistry Sat Questions

Front 1

Is a quantity that allows one to calculate mass if density is known.
(volume, temperature, density, pressure, or mass)

Back 1

volume

Front 2

Always varies with the number of molecules present in a sample of a particular substance.
(volume, temperature, density, pressure, or mass)

Back 2

mass

Front 3

Can be expressed as kilograms per litre.
(volume, temperature, density, pressure, or mass)

Back 3

density

Front 4

Is a measure of the average kinetic energy of a substance's molecules.
(volume, temperature, density, pressure, or mass)

Back 4

temperature

Front 5

I) If the density of a solid substance and its volume are both known, mass can be calculated.
II) For any substance, the relationship between mass and volume varies directly with sample size.

Back 5

T, F

Front 6

I) For any substance, solid, liquid or gas, mass increases as volume increases.
II) Density represents mass per volume.

Back 6

F, T

Front 7

I) If a substance X and Y have specific heats of 0.2cal/gC and 0.6cal/gC, respectively, then 10g of substance X has less heat content than 10g of substance Y.
II) A substance with a relatively low specific heat will, when heated, experience less change in its temperature than a substance with a relatively high specific heat.

Back 7

F, F

Front 8

Two solid objects are of equal volume, but object A has density = X, and object B has density = 0.5X. Which of the following i true concerning objects A and B?
(A) Objects A and B are of equal density
(B) Object B has twice the density of A
(C) Objects A and B are of equal mass
(D) Object A has one half the mass of object B
(E) Object A has twice the mass of object B

Back 8

E

Front 9

The specific heat of a substance is approx. 0.5cal/gC. If 30 calories of heat are absorbed by 15g of the substance at 30C, its temperature will become
(A) 19C (B) 32C (C) 34C (D) 60C (E) 90C

Back 9

C

Front 10

10g of oxygen gas are in a rigid 5L vessel. If 2g of oxygen gas are added to the vessel and temperature is kept constant, which of the following characteristics of the gas will increase?
(I) Mass (II) Density (III) Pressure

Back 10

All three

Front 11

The smallest representative particle of helium.
(atom, ion, neutron, proton, electron)

Back 11

atom

Front 12

Gain or loss creates positively or negatively charged ion, respectively.
(atom, ion, neutron, proton, electron)

Back 12

electron

Front 13

Particle responsible for positive nuclear charge
(atom, ion, neutron, proton, electron)

Back 13

proton

Front 14

Isotopes of uranium always differ in their number of this particle
(atom, ion, neutron, proton, electron)

Back 14

neutron

Front 15

Their number in the nucleus determines an element's atomic number.
(atom, ion, neutron, proton, electron)

Back 15

Proton

Front 16

I) The periodic table doesn't report mass numbers.
II) A mass number can be assigned to one isotope of an element, but not to an element in general.

Back 16

T, T, CE

Front 17

I) Addition of an electron to an atom creates a positively charged ion.
II) Every electron carries a negative charge.

Back 17

F, T

Front 18

Two different sodium atoms or ions may differ in all of the following ways except:
(A) the number of electrons outside their nuclei
(B) the overall charge they carry
(C) their mass numbers
(D) the number of neutrons in their nuclei
(E) the number of protons in their nuclei

Back 18

E

Front 19

Two isotopes of the same element will always differ in
(A) mass number but never in atomic number
(B) atomic number but never in mass number
(C) charge outside but never inside their nuclei
(D) nuclear charge but never in overall charge
(E) the number of electrons outside their nuclei but never in the number of neutrons inside their nuclei

Back 19

A

Front 20

Is a diatomic molecule.
(A) N2O (B) C6H12O6 (C) SO3 (D) NO (E) N2O5

Back 20

D

Front 21

Has a formula weight of approx. 108 amu.
(A) N2O (B) C6H12O6 (C) SO3 (D) NO (E) N2O5

Back 21

E

Front 22

Has an empirical formula different from its molecular formula.
(A) N2O (B) C6H12O6 (C) SO3 (D) NO (E) N2O5

Back 22

B

Front 23

Composition is approx. 60% oxygen given by mass.
(A) N2O (B) C6H12O6 (C) SO3 (D) NO (E) N2O5

Back 23

C

Front 24

I) Chlorine is an element
II) Chlorine exists as unbonded atoms at room temperature and atmospheric pressure

Back 24

T, F

Front 25

I) One mole of HBr has greater mass than one mole of NO2.
II) The mass of a molecule of HBr is greater than the mass of a molecule of NO2.

Back 25

T, T, CE

Front 26

The formula for calcium nitrate is Ca(NO3)2. What is its approximate formula weight?
(A) 64 amu (B) 164 amu (C) 240 amu (D) 310 amu (E) 380 amu

Back 26

B

Front 27

An unknown substance is found to have a composition of 9% magnesium and 91% iodine by weight. The empirical formula for the substance is:
(A)MgI (B) Mg2I2 (C) Mg2I (D) MgI2 (E) Mg3I2

Back 27

D

Front 28

Value that determines whether reaction is spontaneous.
(A) Gibbs free energy
(B) Heat of formation
(C) Enthalpy change
(D) Entropy
(E) Kinetic energy

Back 28

A

Front 29

Quantity that determines whether reaction is exothermic or endothermic.
(A) Gibbs free energy
(B) Heat of formation
(C) Enthalpy change
(D) Entropy
(E) Kinetic energy

Back 29

C

Front 30

Indicates the degree of disorder of a system.
(A) Gibbs free energy
(B) Heat of formation
(C) Enthalpy change
(D) Entropy
(E) Kinetic energy

Back 30

D

Front 31

I) If a reaction is exothermic it always proceeds spontaneously.
II) The universe favours a negative enthalpy change.

Back 31

F, T

Front 32

I) Ice melting is an endothermic process.
II) Heat must be absorbed by ice if it is to melt.

Back 32

T, T, CE