chemical reactions
a starting substance in a chemical reactions
reactant
the SI unit of molar mass is the
Gram/per mol
mole ratios for a reaction are obtained from the
ballenced equation
If I start with 30 mL at 200 K and heat it to 400 K, what would be the new volume. (Pressure is constant)
60 mL
What are the 4 phase changes?
What are melting, evaporating, condensing and freezing?
a solid produced in a chemical reaction in a solution
precipitate
what compound has the smallest molar mass?
H2O,
CO,
or H2O2
H2O
precent yield of a product is a measure of a reactions
efficency
What are the STP values for each unit of pressure (all 4 of them)?
1 atm = 101.3 kPa = 760 mmHg = 760 torr
What phase change is happening when water collects on a cold glass of lemonade on a hot summer day?
What is condensation.
a number written in front of a chemical formula
coefficient
6.02x10^23
Avagadros #
stoichiometry is based on the law of the conservation of what
mass
How many liters are in 50 grams of Cl2 at STP?
15.8 L
What phase change is occuring when a plant wilts in the summer?
What is evaporation.
a reaction in which two or more substances react to produce a signal product
combination reaction
mass in grams of any pure substance
molar mass
in ballenced equations the numbers of individual partical and the numbers of moles of particals are represented by the
coefficants
What is the value for R, and what are its units?
0.0821 L*atm/mol*K
Which two phase changes occur when snow forms in a cloud?
What are condensing and freezing.
a substance formed during a chemical reaction
product
percent by mass of each element in a compound
percent composition
the actual yield of a product is
messured exponentuly
If I have 3.7 moles of gas at 5 L and 210 K, what would the Pressure be?
12.8 atm
What are 2 properties of a liquid?
1. It flows
2. It takes the shape of its container