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ChemistrySpringFinal
Chemistry Semester Two Chapter Tests
| Question | Answer |
|---|---|
| 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