Module 5 Test Questions

Identify the following as an atom, element, or molecule. a. P b. N2 c. oxygen-16 d. PH3.

a. element b. molecule c. atom d. molecule

The element sulfur is comprised of all atoms that have 16 protons. How many neutrons are in a sulfur-34?

18

If the following molecules is a carbohydrate, what is the value of X? C7HxO2

4

How many total atoms are in one molecule of C22H440?

67

Which of the following is an acid molecule?

C

Two solution of different solute concentration are separated by a membrane. After 1 hour, the solution are of equal concentrations and the water levels are the same as when the experiment started. Is this an example of diffusion or osmosis?

Diffusion

What holds the two helixes in DNA together?

Hydrogen Bonding

A student reports on an atom that has 11 protons, 10 neutrons, and 10 electrons. What is wrong with this report?

It has to have the same number of protons and neutrons

If you preform hydrolysis on a disaccharide, what kind of molecule will you get?

Monosaccharide

Two atoms have the same of neutrons but different numbers of protons. Do they belong to the same element?

No

When you boil water, are you causing a chemical change or a physical change?

Physical Change

In the following equation: C3 H8 + 5O2 -> 3Co2 + 4H2O Is CO2 a product or a reaction? How many molecules of it are involved in the reaction?

Product, 3

The pH of three solutions is measured. Solution A has a pH of 1.5, the pH of solution B is 7.1, and solution c has a pH of 13.2. Which solution(s) is or are acidic?

Solution A

What part of the nucleotide is responsible for the way DNA stores its information?

The nucleotides base

What determines the properties of a protein?

The number of amino acids linked together

What are the 4 things necessary for photosynthesis?

carbon dioxide, water, energy from sunlight, and a catalyst