Chemistry SOL CH1

Front

What is the melting point of a substance?

Back

The melting point is the temperature at which a solid becomes a liquid. It is a characteristic property of a substance.

Front

How do you determine the melting point from repeated trials?

Back

The melting point should be reported as the average of the trials, considering the closest values. In the example, the average of 56º, 55º, 57.5º, and 55.5ºC is 56.0ºC.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small in a compact form, using powers of ten.

Front

How is 0.000365 expressed in scientific notation?

Back

0.000365 is expressed as 3.65 x 10⁻⁴ in scientific notation.

Front

What equipment is needed to determine the density of a liquid?

Back

To determine the density of a liquid, a balance (to measure mass) and a graduated cylinder (to measure volume) are needed.

Front

What is the purpose of a fume hood in a laboratory?

Back

A fume hood is used to remove toxic vapors and provide a safe working environment when handling hazardous materials.

Front

What should you do if your hand is exposed to an acidic solution?

Back

You should rinse the hand in running water immediately to dilute and remove the acid.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

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.