Chemistry Test Review: Reactions, Properties, and Calculations
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13 Terms
What are reactants?
Reactants are the substances that you start with in a chemical reaction.
What are products?
Products are the substances that are produced as a result of a chemical reaction.
What does the arrow in a chemical equation represent?
The arrow indicates that reactants are transformed into products, meaning it 'makes', 'produces', or 'yields' the products.
What is a chemical change?
A chemical change is a process that results in the formation of new chemical substances.
What is a physical change?
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.
What are significant figures?
Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.
What are physical property keywords?
Keywords that indicate physical properties include 'react with' and 'does not react with'.
What is the difference between a compound and an element?
A compound is a substance formed when two or more elements are chemically bonded together, while an element is a pure substance that cannot be broken down into simpler substances.
How do you convert liters to milliliters?
To convert liters to milliliters, multiply the number of liters by 1000, since 1 liter equals 1000 milliliters.
What is the formula for density?
The formula for density is D = m/v, where D is density, m is mass, and v is volume.
What is the formula for volume of a rectangular prism?
The formula for volume is L x W x H, where L is length, W is width, and H is height.
What is percent yield?
Percent yield is a measure of the efficiency of a reaction, calculated as the actual yield divided by the theoretical yield, multiplied by 100.
What is percent error?
Percent error is a calculation that expresses the difference between the experimental value and the theoretical value as a percentage of the theoretical value.