Nomenclature
What is the chemical formula for hydrobromic acid?
HBr
_NaN3(s) --> _Na(s) + _N2(g)
Fill in the blanks on this chemical reaction.
2NaN3(s) --> 2Na(s) + 3N2(g)
What are the products of a combustion reaction?
H2O and CO2
How many atoms are in a mole of 5,5-dimethyl-1-hexene?
6.022 x 1023 (Avogadro's number)
How many sig figs are in 5.00907?
6
Water is the common name for H₂O. What is the name using proper nomenclature rules?
Dihydrogen monoxide
C2H6(g) + O2(g) --> CO2(g) + H2O(g)
This equation is unbalanced. When balanced, what is the coefficient for O2?
7
2C2H6(g) + 7O2(g) --> 4CO2(g) + 6H2O(g)
Name the five basic types of reactions.
Combination (Synthesis)
Decomposition
Single Displacement
Double Displacement
Combustion
5.13 grams
What are the units of molarity (M)?
moles per liter (mol/L)
What is the chemical formula for nitrous acid?
HNO2
Nitrogen gas and hydrogen gas combine to form ammonia (NH3). What is the complete balanced equation?
N2 (g) + 3H2 (g) --> 2NH3 (g)
Give a valid example for 3 of the 5 types of chemical reactions (other than those that have already appeared in this game).
Lots of answers
What is the molar mass of calcium bicarbonate? Ca(HCO₃)₂
162.11 g/mol
What is the difference between empirical formula and molecular formula?
Empirical formulas show the simplest whole-number ratio of atoms in a compound, molecular formulas show the number of each type of atom in a molecule
Polyatomic ions are a set of covalently bonded atoms with a collective charge that can be thought of as behaving as a single unit. Name 3 polyatomic ions, and show their chemical formula and charge.
Lots of options
Aluminum metal reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. What is the ratio of hydrogen gas produced to aluminum metal consumed?
3/2, 3:2, 1.5:1, etc.
2 Al + 3 H2SO4 --> Al2(SO4)3 + 3 H2
Pb + FeSO4 --> PbSO4 + Fe
What type of reaction is this? How do the charges on the transition metals change?
Single Displacement
Pb: 0 --> 2(ii)
Fe: 2(ii) --> 0
How many atoms of nitrogen are in 0.1250g of caffeine, C8H10N4O2?
1.55 x 1021 atoms of N
The column on the periodic table containing F, Cl, Br, and I is called what?
Halogens
What is the name of this compound? Fe2(SO4)3
Iron (iii) Sulfate
Balance the following:
_C57H110O6(s) + _O2(g) --> _CO2(g) + _H2O(l)
2C57H110O6(s) + 163O2(g) --> 114CO2(g) + 110H2O(l)
The following is a special type of double-displacement reaction. What is it called?
HCl (aq)+NaOH (aq)→H2O (l)+NaCl (aq)
Acid-Base Reaction / Neutralization
Determine the empirical and molecular formula for chrysotile asbestos. Chrysotile has the following percent composition: 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O. The molar mass for chrysotile is 520.8 g/mol.
Mg3Si2H3O8 (empirical formula)
Mg6Si4H6O16 (molecular formula)
What is a limiting reactant? In the following situation, which compound is limiting?
5.15 g of hydrogen gas is reacted with 36.7 g of carbon monoxide to produce methanol (CH3OH).
The limiting reactant is the reactant that is first to be used up in a chemical reaction.
H2 is the limiting reactant.