CHEMISTRY

One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?

• 1kg

• 250g

• 500g

• Practically none

If you fill a glass to the brim with ice water and the ice melts, what will happen?

• The glass will over flow as the ice turns to water.

• The level of water in the glass will remain unchanged as the ice melts.

• • The water level will drop slightly as the ice melts.

• I'll never find out because I'll drink the water or walk away before anything happens.

The symbol Ag stands for which element?

• Gallium

• Gold

• Argon

• silver

Three of the most common states of matter are solids, liquids, and gases. A liquid has:

• • A defined volume, but not a defined shape

• A definite shape, but no defined volume

• A defined volume and shape

• No defined volume or shape

A mole contains Avogadro's number of items. What is Avogadro's number?

• 6023

• • 6.023 x 10^23

• 6.02 x 10^-23

• 3 x 10^8

What do you call an atom that has more protons than electrons?

• Molecule

• Isotope

• Anion

• Cation

A drop of food coloring spreading out in a cup of water is an example of which transport process?

• Diffusion

• Osmosis

• Vapor

• Pressure

In a solution of saltwater (a saline solution), salt is the:

• Solute

• Solvent

• Colloid

• Sol

All of the following elements are liquids around room temperature except which one?

• Gallium

• Magnesium

• Bromide

• Mercury

All of the following are amino acids except:

• • Tryptophan

• Leucine

• Tyrosine

• Adenine