Final Exam 1 Question Preview (ID: 19327)


Final. TEACHERS: click here for quick copy question ID numbers.

You should pour water into acid.
a) True
b) False
c)
d)

A change of 1 pH unit represents a one hundred fold change in the acidity of the solution
a) True
b) False
c)
d)

pH is the measure of how acidic or basic a solution is
a) True
b) False
c)
d)

A pH above 7 is basic and a pH below 7 is acidic.
a) True
b) False
c)
d)

Endothermic reactions will always drop in temperature
a) True
b) False
c)
d)

In an exothermic reaction the system gains energy in the form of heat.
a) True
b) False
c)
d)

Endothermic reactions absorb energy from the surroundings
a) True
b) False
c)
d)

In the following equation, which of these is a reactant that is dissolved in water? Cu(s) + AgNO3(aq) → Ag(s) + Cu(NO3)2(aq)
a) Cu
b) AgNO3
c) Ag
d) Cu(NO3)2

We balance equations because:
a) mass cannot be created or destroyed
b) it follows the law of conservation of mass
c) atoms can be rearranged but can not appear or disappear
d) all of the above

In the reaction 2H2 + O2 → 2H2O, what is the mole ratio of oxygen to water?
a) 1 mole O2/ 2 mol H2O
b) 2 mole O2/ 1 mol H2O
c) 2 mole O2/ 5 mol H2O
d) 2 mole O2/ 2 mol H2O

For the reaction C + 2H2 → CH4, how many moles of hydrogen are required to produce 10 mol of methane, CH4?
a) 2 mol
b) 4 mol
c) 10 mol
d) 20 mol

For the reaction 2Na + 2H2O → 2NaOH + H2, how many grams of NaOH are produced from 3.0 mol of water?
a) 40. g
b) 80. g
c) 120 g
d) 240 g

For the reaction Pb(NO3)2 + 2KI → PbI2 + 2KNO3, how many moles of PbI2 are produced from 300. g of potassium iodide?
a) 0.903 mol
b) 1.81 mol
c) 3.61 mol
d) 11.0 mol

For the reaction 2Na + Cl2 → 2NaCl, how many grams of NaCl can be produced from 500. g of chlorine?
a) 112 g
b) 319 g
c) 409 g
d) 825 g

Which reactant controls the amount of product formed in a chemical reaction?
a) excess reactant
b) mole ratio
c) mass ratio
d) limiting reactant

What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
a) mole ratio
b) percent yield
c) Avogadro yield
d) excess yield

What is the study of the mass relationships among reactants and products in a chemical reaction?
a) stoichiometry
b) limiting reactants
c) percent yeild
d) periodic law

In the following problem, what element is the “known”? For the reaction Pb(NO3)2 + 2KI → PbI2 + 2KNO3, how many moles of PbI2 are produced from 300. g of KI?
a) Pb(NO3)2
b) KI
c) PbI2
d) KNO3

According to the kinetic-molecular theory, gases condense into liquids because of
a) gravity.
b) atmospheric pressure.
c) forces between molecules.
d) elastic collisions.

According to the kinetic-molecular theory, which substances are made of particles?
a) ideal gases only
b) all gases
c) all matter
d) all matter except solids

Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 19327 in the upper right hand corner or click here.

TEACHERS / EDUCATORS
Log In | Sign Up / Register

Help / Support / FAQ




Gaming Links