RC Final Exam F24

Front

What is the meniscus in a graduated cylinder?

Back

The meniscus is the curve at the surface of a liquid in a graduated cylinder, which is used to accurately read the liquid level.

Front

How do you measure the meniscus in a graduated cylinder?

Back

To measure the meniscus, place the graduated cylinder on a flat surface and read the level at the bottom of the curve.

Front

What is the percent by mass of sodium in NaCl?

Back

39%.

Front

How do you calculate the percent by mass of an element in a compound?

Back

Percent by mass = (mass of element in 1 mole of compound / molar mass of compound) x 100.

Front

What is a control group in an experiment?

Back

The control group is the part of the experiment that is kept constant and is used for comparison against the experimental group.

Front

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

Back

The independent variable is manipulated in an experiment, while the dependent variable is measured to see how it responds to changes in the independent variable.

Front

What does it mean for a substance to be soluble?

Back

A substance is soluble if it can be dissolved in a solvent.

Front

What is an example of a soluble substance?

Back

Table salt (NaCl) is an example of a soluble substance in water.

Front

Which unit is used to measure volume?

Back

Liters.

Front

What is the relationship between volume and capacity?

Back

Volume is the amount of space an object occupies, while capacity refers to the maximum amount a container can hold.