Chem Composition
Chem Quantities
Energy
Chemical Bonding
Solids, Liquids, Gases
100
Molar mass of Water
What is 18.02 g/mol
100
Balance the chemical equation:
H2 + O2 --> H2O
What is
2H2 + O2 --> 2H2O
100
A reaction that absorbs energy from its surroundings
What is endothermic
100
The bond that results when a metal reacts with a nonmetal
What is ionic bond
100
The process by which a liquid changes into a gas
What is evaporation
200
Molar mass iof Ba(NO3)2
What is 261.35 g/mol
200
Given the balanced chemical equation:
2H2 + O2 --> 2H2O
Question:
If you have 4.0 moles of H₂, how many moles of H₂O will be produced?
What is 4.0 moles of H2O
200
The two forms of energy
What is potential and kinetic energy
200
The bond that forms from an unequal sharing of electrons between two atoms
What is polar covalent bond
200
The vapor pressure over a beaker of hot water is measured as 656 torr. What is this pressure in atmospheres?
Conversion: 1 atm = 760 torr
What is 0.863 atm
300
Mass percent of Hydrogen in C2H5OH
What is 13.15%
300
What is the percent yield?
Theoretical yield = 75.0 g
Actual yield = 68.4 g
What is 91.2%
300
What type of reaction occurs when water is boiled in a tea kettle
What is endothermic
300
Draw the Lewis Structure for PBr3
What is
300
A sample of helium gas occupies 12.4 L at 23 °C and 0.956 atm. What volume will it occupy at 1.20 atm assuming that the temperature stays constant?
What is 9.88L
400
The composition of adipic acid is 49.3% C, 6.9% H, and 43.8% O (by mass). What is the empirical formula?
What is C3H5O2
400
How many grams of NH3 can be produced from the mixture of 3.00 g each of nitrogen and hydrogen by the Haber process?
N2 + 3H2 --> 2NH3
What is 3.65g NH3
400
Calculate the amount of heat energy (in joules) needed to raise the temperature of 6.25 g of water from 21.0 °C to 39.0 °C
specific heat capacity for water = 4.184 J/g*°C
What is Q = 470.7 J
400
Which molecule is capable of forming stronger intermolecular forces? N2 or H2O
Explain
H2O
400
What is the pressure in a 304.0-L tank that contains 5.670 kg of helium at 25 °C?
What is 114 atm
500
Empirical formula = CH2O
Molar mass = 180 g/mol
What is C6H12O6
500
You react 5.00 grams of hydrogen (H₂) with oxygen gas to form water:
H2 + O2 --> 2H2O
If you actually produce 42.0 grams of water, what is the percent yield?
What is 94.2%
500
Given:
Calculate
What is 1268 KJ
500
Look at the lewis structures for the formula C2H6O and compare the boiling points of the two molecules
What is
will have the higher boiling point because it exhibits hydrogen bonding
500
At what temperature (in °C) does 121 mL of CO2 at 27 °C and 1.05 atm occupy a volume of 293 mL at a pressure of 1.40 atm?
What is 696 °C