Chapter 11
What is on the left side of a chemical reaction?
Reactants
What is the portion of chemistry dealing with numerical relationships in chemical reactions?
Stoichiometry
The conversion of a liquid to a gas or vapor is called?
Vaporization
Which state of matter is the easiest to compressed?
Gas
At what temperate does water freeze?
0*C
What is a Catalyst?
A substance that increases the rate of the reaction by lowering the activation-energy barrier
How do chemists balance chemical equations?
Chemists use balanced chemical equations as a basis to calculate how much recant is needed or how much product will be formed in a reaction.
True or False: Atmospheric pressure increases as you climb a mountain?
False
What state of matter does not have a fixed volume or shape?
Gases
Which is more dense ice or water?
Water
The arrow in a chemical equation means what?
“yield”
What is an Excess reagent?
A reagent present in a quantity that is more than sufficient to react with a limiting reagent: any reactant that remains after the limiting reagent is used up in a chemical reaction.
True or False: Liquids are much denser than gases?
True
What is a measure of how much the volume of matter decreases under pressure?
Compressibility
How many atoms are in a simple molecule of water?
Three
Hydrogen Peroxide --> water + ____
oxygen
What is the mole ratio?
In chemical calculations, mole ratios are used to convert a given number of moles of a reactant or product to moles of a different reactant or product.
What is the result of simultaneous collisions of billions of rapidly moving particles in a gas with an object?
Gas Pressure
What are three things that affect gas pressure?
Temperature, volume, and amount of gas
What kind of bonds holds water together?
Hydrogen Bonds
What are the five general types of reactions?
Combination, decomposition, single-replacement, double-replacement, and combustion
What is this formula called 6.02 x 1023?
Avogrado Number
When a low-pressure system is moving into your region. What kind of weather is coming?
Storms
If the volume is constant, the temperature of the enclosed gas increase then the pressure______?
Increases
What arrangement is ice in?
Hexagon