Periodic Table
Atomic/Mass Number
Dimensional Analysis
Balancing Equations & Theoretical Yield
Empirical + Molecular Formula
100
What are the subatomic particles of an atom?
protons, neutrons, electrons
100
How many protons, neutrons, and electrons are there in the isotope 59Co3+?
Protons: 27
Neutrons: 32
Electrons: 24
100
How many sulfur atoms are there in 6.50mol of Sulfur? 3 Sigfigs
3.91 x 1024 S atoms
100
Balance the following equation:
H2(g) + Cl2 (g) --> _HCl(g)
H2(g) + Cl2 (g) --> 2 HCl(g)
100
What is the formula to find n?
n = molar mass / empirical formula mass
200
What does the atomic # represent?
amount of protons
200
How many protons, neutrons, and electrons are there in the isotope 18O2- ?
Protons: 8
Neutrons: 10
Electrons: 10
200
What is the amount in moles of the following substance?
12.8g Ar
0.320 mol Ar
200
Balance the following equation:
Cu2O(s) + C(s) -> _Cu(s) + CO(g)
Cu2O(s) + C(s) -> 2Cu(s) + CO(g)
200
Caffeine has the following percent composition: carbon, 49.48%; hydrogen 5.19%, oxygen 16.48%; and nitrogen, 28.85%. What is its empirical formula?
C4H5ON2
300
What group of the periodic table holds the noble gases?
group 18
300
Give the # of protons, neutrons and electrons for the following: 18O
p= 8, n=10, e- = 8
300
How many silver atoms are there in 3.84g of silver?
2.14 x 1022 atoms Ag
300
Balance the following equation: _Ca3(PO4)2 + _SiO2 → _P4O10 + _CaSiO3
2Ca3(PO4)2 + 6SiO2 → P4O10 + 6CaSiO3
300
A compound is found to have 46.67% nitrogen, 6.70% hydrogen, 29.98% carbon, and 36.65% oxygen. What is its empirical formula?
N3H6C2O2
400
What are the diatomics?
Oxygen, Hydrogen, Chlorine, Fluorine, Bromine, Nitrogen, Iodine
400
Copper has two naturally occurring, stable isotopes. These isotopes are copper-63 (69.15% natural abundance & mass of 62.93 amu), and copper-65 (30.85% natural abundance & mass of 64.93 amu). Calculate the atomic mass of copper based on this information. Do not round to prper sig figs (carry extra).
63.547 amu Cu
400
How many carbon atoms are there in a diamond (pure carbon) with a mass of 52mg?
2.6 x 1021 atoms C
400
The limiting reagent for a given reaction can be recognized because it is the reagent that
a) has the smallest mass in the reaction mixture.
b) has the smallest coefficient in the balanced equation for the reaction.
c) would be used up first.
c) would be used up first.
400
What is the empirical formula of a compound that is 69.94% Fe and 30.06% O by mass? Assume a 100g sample.
Fe2O3
500
Where in the periodic table are the non-metals located?
500
Silicon has 3 naturally occurring isotopes. Isotope 1 has a mass of 27.976 amu and a relative abundance of 92.23%, isotope 2 has a mass of 28.976 amu and a relative abundance of 4.67%. Isotope 3 has a mass of 29.973 amu and a relative abundance of 3.10%. What is the average atomic mass of Si?
28.086 amu Si
500
If you are going 55 mph, what is your speed in centimeters per second?
2.5 x 103 cm/s
500
What is the mass (in grams) of TiO2 formed when 0.476 g TiCl4 are reacted with 0.0501g H2O?
TiCl4 + 2H2O -> TiO2 + 4HCl
Hint: Determine limiting reactant and theoretical yield.
0.111g
500
A major textile dye manufacturer developed a new yellow dye. The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol. Determine the molecular formula of the dye.
C15H15N3