chapter 9
What are the 5 types of chemical reactions?
Synthesis
Decomposition
Single replacement
Double replacement
Combustion
What is stoichiometry?
The calculation of quantities in chemical reactions using mole ratios.
What is the atomic mass of O2?
16.0 amu
What instrument is used to measure Air pressure?
Barometer
True/false: Acids are proton acceptors.
False
Out of all the 7 diatomic molecules, which molecule is considered a liquid?
Bromine
Given N2 + 3H2 —> 2NH3. How many liters of H2 are needed to produce 1.98 grams of ammonia at STP?
3.9 liters of H2
How many atoms are in one mole according to Avogadro?
6.022 x 1023
According to Atmospheric Pressure, as altitude increases, pressure does what?
Decreases
In HCl + H2O —-> H3O + Cl, what is the conjugate base?
Cl-
Balance the following equation: HClO4 + P4O10 ——> H3PO4 + Cl2O7
12:1:4:6
In Na2SO + 2HCl —> 2 NaCl + SO2 + H2O, what is the limiting reactant if given 25.0 grams of Na2SO3 and 22.0 grams of HCl to make SO2?
LR: Na2SO3
Given C2H6. Would this be a molecular or empirical formula.
Molecular
According to Boyle’s Gas Law, as volume ____, pressure ___ and temperature _____ .
Increases, Decreases, Remains Constant
Name two heterogeneous mixtures.
Suspensions
Colloids
What are the driving forces of Ba(OH)2 + 2HNO3 —> Ba(NO3)2 + 2H2O
Water, toe-
P4 + 6H2 —> 4PH3
If given 1.37 liters of PH3, then how much PH3 was actually produced if you performed the reaction and obtained a 62.5% yield?
Actual= 85.6 Liters.
What is the mass of 9.90 x 1023 molecules of N2O3?
72.3 grams
A 1.60 gram sample of metal requires 5.80 Joules of energy to change temperature from 23 degrees Celsius to 52 degrees Celsius. What is the specific heat of this metal.
0.125 J/grams C
You have 1500.0 g of a bleach solution. The
percent by mass of the solute (sodium hypochlorite
NaOCl) is 3.62%. How many grams of the solute are
in the solution?
54.3 grams of solute.
Find the products of the following equation:
NaBr + CaF2 ——> ?
No reaction
Given: Ca(OH)2 + 2HCl —> CaCl2 + 2H2O
If you begin the reaction with 20.0 grams of calcium hydroxide, then what is the theoretical yield, in grams, of water?
9.72 grams of H2O
A compound has a molar mass of 86.0 g/mol and has the percent composition by mass of 55.8% C, 37.2% O and 7.0% H. Determine the molecular formula.
C4H6O2
How much heat is needed, in Joules, to raise the temperature of 550.0 grams of steam from 100. C to 120 C.
76,310 J
What is the pH and pOH of a solution with an [OH-] concentration of 2.5 x 10-11M?
PH: 10.6
POH: 3.4