Module 1 TEST

Front

A molecule is broken down into its constituent atoms. Do these atoms have the same properties as the molecule?

Back

NO.

When atoms join to make a molecule, their individual properties disappear and the molecule takes on its own, unique properties. When the molecule is broken down into its atoms, the atoms regain their individual properties.

Front

When salt is dissolved in water, it actually breaks down into two different substances. Is salt composed of atoms or molecules?

Back

Salt is composed of molecules.

Front

A student measures the mass of a book as 12,321 g. What is the book's mass in kg?

Back

12.321 g

Front

If a glass contains 0.121 L of milk, what is the volume of milk in mL?

Back

121 mL

Front

In the National Basketball Association (NBA), the distance from the three-point line to the basket is 723.9 cm at the top of the arc. What is this distance in meters?

Back

7.239 m

Front

A piece of yarn is 3.00 inches long. How many centimeters long is it? (1 in =2.54 cm)

Back

7.62 cm

Front

How many slugs are there in 12 kg? (1 slug = 14.59 kg)

Back

.82 slugs

Front

If an object occupies 3.2 gallons of space, how many liters of space does it occupy? (1 gallon =3.78 L)

Back

12 L

Front

Muriatic acid is sold in hardware stores for use in cleaning. Pool owners, for example, use it to clean hard water stains and algae from their pools. Its active ingredient is hydrochloric acid. The Works is a toilet bowl cleaner with hydrochloric acid as its active ingredient. There are approximately 350 g of hydrochloric acid in a liter of muriatic acid, and there are approximately 30 g of hydrochloric acid in a liter of The Works. WHY IS MURIATIC ACID A MORE POWERFUL CLEANER THAN THE WORKS?

Back

Muriatic acid is the more powerful cleaner because the active ingredient is more concentrated.

Front

Sodium is a necessary part of a healthy diet. If a person does not ingest enough sodium every day, that person will get sick and perhaps die. Nevertheless, some people try to limit their sodium intake by eating low-salt diet. How can it be good to limit your sodium intake, even though sodium is a necessary part of body chemistry?

Back

Sodium is necessary for the body at a cetain concentration. If you eat too much sodium, you raise the concentration too much.