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ChemistrySpringFinal

Chemistry Semester Two Chapter Tests

QuestionAnswer
Stoichiometry is based on the law of conservation of _____. mass.
In a balanced chemical equation, the numbers of individual particles and the numbers of moles of particles are represented by the _____. coefficients.
Mole ratios for a reaction are obtained from the _____. balanced chemical equation.
What is the first step in solving any stoichiometric problem? Balance the chemical equation representing the reaction.
Calculating the mass of a reactant and product from the number of moles of another product or reactant in a chemical equation is an example of a _____. mole-to-mass converstion
Limiting a reactant is often accomplished by ______. using an excess of another reactant.
Percent yield of a product is a measure of a reaction's _____. efficiency.
The actual yield of a product is _____. measured experimentally.
The study of the quantitative relationships among the amounts of reactants used and the amounts of products formed by a chemical reaction is called ______. stoichiometry.
A _____ is a ratio between the number of moles of any two substances in a balanced chemical equation. mole ratio.
The reactant that limits the extent of the reaction is called the ______. a limited reactant.
The ratio of the actual yield to the theoretical yield expressed as a percent is called the ______. percent yield.
Gas molecules are easily compressed because there is a lot of _____ between the particles. empty space.
A gas expands until it fills its container because its particles are in constant and _____ motion. random.
The SI unit of pressure is the _____. paskals.
The total pressure of a mixture of gases is _____ the sum of the partial pressures of the gases in the mixture. equal to
The total pressure of a mixture of gases is _____ the sum of the partial pressures of the gases in the mixture. greater than
Attractions between oppositely charged regions of polar molecules are _____ forces. dipole-dipole
_____ are compounds that lower the surface tension of water. Surfactants
An ice cube melts as is _____ energy from its surroundings. absorbs
_____ is the point on a phase diargram that represents the temperature and pressure at which three phases of a substance can coexist. Triple point
In elastic collisions between gas molecules, no kinetic energy is lost.
Force per unit area: pressure
The model describing the behavior of gases in terms of particles in motion kinetic-molecular theory
An instrument used to measure atmospheric pressure barometer
A measure of the average kinetic energy of the particles in a sample of matter temperature
The movement of one material through another diffusion
States that the rate of effusion for a gas is inversely proportional to the square root of its molar mass Graham's law of effusion
Created by: cassiesaldi
 

 



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