Unit 6: Mole
How many atoms are in 1 mole of a substance?
6.022 x 1023 atoms
Classify the following chemical reaction:
2 H2O2 --> 2 H2O + O2
Decomposition
This measures the concentration of a solution defined as the number of moles of solute per liter of solution
Molarity
This gas law states that pressure and volume are inversely related when temperature is constant.
Boyle's Law
In this type of reaction, heat is absorbed from the surroundings.
Endothermic
How many moles are in 88 grams of carbon dioxide (CO2)?
2.0 moles
Balance the following chemical equation:
_____N2O5 --> ____ NO2 + ____ O2
2 N2O5 --> 4 NO2 + O2
Which of the following is not considered an electrolyte?
A) Acids
B) Bases
C) Ionic Compounds
D) Covalent Compounds
D) Covalent Compounds
A gas occupies 2.0 L at 1.0 atm. If the pressure doubles and temperature stays constant, what is the new volume?
1.0
During this type of reaction, the surroundings usually feel warmer.
exothermic
A compound has an empirical formula of CH2 and a molar mass of 42.08 g/mol. What is its molecular formula?
C3H6
Given the following balanced equation, how many moles of chlorine gas can be produced if you have 4 moles of FeCl3?
4FeCl3 +3O2 --> 2 Fe2O3 + 6 Cl2
6 mol Cl2
What ion do acids produce in water?
H+
According to this gas law, volume and temperature are directly related when pressure is constant.
Charles's Law
This type of radiation consists of helium nuclei.
Alpha
A 50 g sample of a compound contains 30 g of oxygen. What is the percent by mass of oxygen in the compound?
60%
Predict the products for the following reactants:
C3H8 + O2 -->
CO2 + H2O
What is the pOH of a 1.0 x 10-3 HCl solution?
11
A balloon shrinks when placed in a freezer because the gas particles have this type of change in kinetic energy.
decrease
The process where a large nucleus splits into smaller nuclei is called this.
Fission
A compound contains 85.7% carbon and 14.3% hydrogen. Its molar mass is 42 g/mol. Determine its empirical and molecular formula.
Empirical: CH2
Molecular: C3H6
How many grams of hydrogen gas can be produced from the following reaction if 65 grams of zinc and 65 grams of HCl are present in the reaction?
Zn + 2 HCl --> ZnCl2 + H2
1.8 g H2
What is the name of a reaction between an acid and a base?
Neutralization
This temperature scale must be used in gas law calculations.
Kelvin
This process powers the Sun by combining small nuclei into larger nuclei.
fusion