First Semester Chemistry Review 2019

Front

What is the definition of density?

Back

Density is the mass of an object divided by its volume, typically expressed in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

Front

How do you calculate the mass of an object using density and volume?

Back

Mass = Density × Volume.

Front

What is the formula for calculating the volume of a rectangular prism?

Back

Volume = Length × Width × Height.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the molecule.

Front

What is the melting point of a substance?

Back

The melting point is the temperature at which a solid becomes a liquid.

Front

How do you convert Celsius to Kelvin?

Back

Kelvin = Celsius + 273.15.

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement and help convey the uncertainty in the data.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is the definition of a chemical compound?

Back

A chemical compound is a substance formed when two or more elements chemically bond together.

Front

What is the role of valence electrons in chemical bonding?

Back

Valence electrons are the outermost electrons of an atom and are involved in forming bonds with other atoms.