Predicting Products
Law of Conservation
Chemical Reactions
Review 1
Review 2
100
BONUS - 700 points!
What are the 7 diatomic elements? (element symbols are fine, ALL OR NOTHING)
H, N, O, F, Br, Cl, I
100
What does the law of conservation of mass state?
Mass (or matter) cannot be created nor destroyed
100
"Paper is flammable" is an example of a....
a) Physical Property
b) Chemical Property
c) Physical Change
d) Chemical Change
b) Chemical Property
100
DOUBLE POINTS: All or nothing!
1) What are the three subatomic particles?
2) Which one has no essentially no mass?
1) proton, neutron, electron
2) electron
100
Quadruple points: All or nothing!
1) What element is 1s2 2s2 2p6 3s2 3p6?
2) Name an element in the same group.
3) Name an element in the same period.
4) Do elements in the same group or period have similar properties?
1) Argon
2) Helium, neon, krypton, xenon, radon
3) Na, Mg, Al, Si, P, S, Cl
4) Elements in the same GROUP have similar properties
200
Select the correct reaction: Mg + NaCl ->
a) Mg + NaCl -> MgCl + Na
b) Mg + 2 NaCl -> MgCl2 + 2 Na
c) Mg + NaCl -> NaMg + Cl
d) Mg + NaCl -> MgNaCl
b) Mg + 2 NaCl -> MgCl2 + 2 Na
Single replacement, metals can only replace metals
200
Balance the following reaction:
____ Zn + ____ Cl2 → ____ ZnCl3
__2__ Zn + ___3__ Cl2 → __2__ ZnCl3
200
What type of reaction is this?
NaCl + SrBr -> NaBr + SrCl
Double Replacement
200
An atom has 5 protons, 6 neutrons, and 4 electrons. What is its mass?
11 amu
200
Calculate the density of a block that has a mass of 6 g and a volume of 12 mL. INCLUDE THE CORRECT UNIT.
1) 0.5 g/mL
300
Predict the full reaction: FeCl3 →
a) FeCl3 → Fe + Cl3
b) 2 FeCl3 → 2 Fe + 3 Cl2
c) FeCl3 → Fe + Cl2
d) 2 FeCl3 → 3 Fe + 2 Cl3
b) 2 FeCl3 → 2 Fe + 3 Cl2
300
2 H2 + O2 -> 2 H2O
I start with 4.4 grams of hydrogen gas and 32 grams of oxygen gas. What mass of water should I produce?
36.4 grams (mass of reactants = mass of products)
300
What two products do combustion reactions ALWAYS have?
CO2 and H2O
(carbon dioxide and water)
300
Look at the atomic symbol below. (All or nothing)
1)What does the number 14 represent?
2)What does the number 6 represent?
3)How many neutrons does this isotope have?
1) mass (protons and neutrons)
2) atomic number/number of protons
3) 8 (subtract!)
300
Calculate the mass of an object that has a density of 1.9 g/mL and a volume of 0.4 mL. Round to the nearest 0.1 and include the correct unit.
0.8 g
400
Predict the correct full reaction for the following reactants: Rb + O2 →
a) 2 Rb + O2 → RbO2
b) Rb + O2 → RbO2
c) Rb + O2 → Rb2O
d) 4 Rb + O2 → 2 Rb2O
d) 4 Rb + O2 → 2 Rb2O
400
Fill in the missing data below: Na + Cl -> NaCl
Na = 12 g
Cl = ?
NaCl = 30 g
18 g
400
Which of the following is a chemical change:
a) freezing water to make ice
b) heating up water
c) boiling or evaporating water
d) none of the above
d) none of the above
400
Name the following:
1) NaBr
2) Li
3) Br2
1) Sodium Bromide
2) Lithium
3) Bromine
400
Calculate the average atomic mass for an unknown element whose isotopes have the following masses 23.985 amu (78.99%), 24.986 amu (10.00%), and 25.983 amu (11.01%). Round to the nearest 0.01 and include the correct UNIT.
24.31 amu
500
Aluminum metal reacts with sodium oxide in a single replacement reaction.
1) What is the formula of the compound that will be produced?
2) How do you know if aluminum replaces sodium or oxygen?
1) Al2O3
2) Metals replace metals
500
Balance the following reaction:
_ C2H4 + _ O2 → _ H2O + _ CO2
1, 3, 2, 2
500
Solid Sodium Hydroxide is decomposed to form solid sodium oxide and water vapor. Which indicator of chemical reactions is observed here?
a) formation of gas
b) unexpected color change
c) unexpected light
d) change in odor
e) precipitate formation
a) formation of gas
500
1) What kind of bond is in CaCl2?
2) What is the name of CaCl2?
3) What kind of bond is in N2O3?
4) What is the name of N2O3?
1) ionic
2) calcium chloride
3) covalent
4) dinitrogen trioxide
500
Rank the intermolecular forces from strongest to weakest: Dipole-Dipole, London Dispersion, Hydrogen Bonding
(strongest) Hydrogen bonding, dipole-dipole, london dispersion (weakest)