UNIT 1 - Review

Front

How many significant figures are in the measurement 760 mmHg?

Back

3 significant figures.

Front

A solution where the solvent is water is known as a(n) __________.

Back

aqueous solution.

Front

Which of the following is not a sign that a chemical reaction may have occurred? Giving off heat, Sudden color change from clear to yellow, Changing state from liquid to gas, The formation of a precipitate.

Back

Giving off heat.

Front

Calcium chloride has a density of 2.50 g/cm³. If you have 218 g of it, what volume do you have?

Back

87.2 cm³.

Front

A factor in an experiment that is kept the same amongst all groups in an experiment is the __________.

Back

constant.

Front

Define significant figures.

Back

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.

Front

What is an aqueous solution?

Back

An aqueous solution is a solution in which the solvent is water.

Front

List one sign that a chemical reaction has occurred.

Back

Sudden color change.

Front

What is the formula to calculate density?

Back

Density = Mass / Volume.

Front

What is the difference between an independent variable and a dependent variable?

Back

The independent variable is the one that is changed or controlled in an experiment, while the dependent variable is the one that is measured or observed.