Measurements
The term used to describe the closeness of a measured value to the true value.
accuracy
Where do you get a mole ratio from? Be specific.
balanced chemical equation
Which state of matter takes the shape of its container?
liquid
The most abundant human-caused greenhouse gas.
carbon dioxide
(CO2)
What is the name of the resource found under Classwork on GC that you can use to guide yourself through a stoichiometry problem?
Mole Map
The term used to describe the closeness of a set of measurements to each other.
precision
periodic table
What's the phase change that goes from solid to liquid?
melting
The main way we cause an abundance of CO2 in the atmosphere is by the combustion of aka burning of _________.
fossil fuels
What phase change involves a solid going directly to a gas?
sublimation
Calculate the molar mass of C7H2P3. Don't forget units.
179.0146 g/mol
What is the mole ratio between CO and H2?
8 CO + 17 H2 → C8H18 + 8 H2O
8 mol CO
_______
17 mol H2
What is the phase change that goes from gas to solid?
deposition
What is the collective name for gases that absorb and reradiate heat into the atmosphere.
greenhouse gases
List 3 ways you could reduce your carbon footprint.
Answers will vary.
What is the density of a substance that weighs 7.8 g and has a volume of 24.5 mL? Don't forget units.
D=m/v
0.318 g/mL
Write the following equation on your board and balance it.
____SnO2 + ___ H2 → ____Sn + ____H2O
SnO2 + 2 H2 → Sn + 2 H2O
If the temperature of a gas is tripled and the volume is held constant, what will happen to its pressure?
pressure will triple
What is the name of the process that results from CO2 dissolving in oceans and leading to a reduction in the building blocks for marine life?
Ocean Acidification
Which data set is precise but not accurate?
The true density of an unknown substance is 4.9 g/mL. The following are group trials to determine this.
Group 1: 4.9, 4.3, 4.6, 4.9
Group 2: 4.9, 4.8, 4.8, 5.1
Group 3: 4.5, 4.6, 4.5, 4.5
Group 3: 4.5, 4.6, 4.5, 4.5
What is the percent composition of N in N2O? Round to two decimal places.
%comp = total mass of element / total mass of molecule x 100
63.65%
How many moles of NaI can be produced from 3.5 g of Na2S?
2 AgI + Na2S → Ag2S + 2 NaI
Hint: molar mass of Na2S is 78.0452 g/mol
0.0897 mol NaI
What theory describes the movement of ideal gas particles?
Kinetic Molecular Theory
In order to slow global warming, we should all do things to reduce our carbon ____________.
footprint
What is the molar mass of C2H8? Show your work.
C=12.011 x 2 = 24.022
H=1.008 x 8 = 8.064
______
32.086 g/mol