Exam 1 Review :D

Module 1

100

How many significant figures are in 30000.5

5!

200

What is the difference between heterogenous mixtures and homogenous mixtures?

Heterogenous: Not uniform throughout 

Homogenous: Uniform composition, cannot be separated by physical means 

300

Complete the following equation with proper sig figs:

7356.4+78.79087= 

7435.2

400

Is an iron nail rusting, what type of change would that be?

Chemical change 

500

Convert 14.3 Tg to pg

1.43 x 10²²

Module 2

100

Is covalent bonding the equal sharing of electrons or the unequal sharing of electrons?

Equal sharing of electrons between a nonmetal and nonmetal

200

What is an ion and what are the two types of ions?

Ion= charged particle 

Two types = cations (+) 

                   anions (-)

300

Give the name for the following compound:

FeCl2 

Iron (II) chloride 

400

Give the formula for Lithium Phosphate 

Li3(PO4)

500

Give the name for the following acid:

H(IO2)

Iodous acid 

Module 3

100

How do I obtain molar mass?

Obtaining it from the atomic mass on the periodic table 

200

What is Avogadros number?

6.022 x 10²³

300

What is the molar mass for water?

18.016

400

Convert 42.1 grams of NaCl to molecules of NaCl

4.34 x 10²³

500

How many atoms of H are there in 12.9 grams of C6H12O6

5.05 x 10²³ 

Random

100

What elements make up a hydrocarbon?

Hydrogen and Carbon

200

When ions form, is it the loss/gain of electrons of protons?

Electrons

300

What is an isotope?

The variations in protons of a single element that leads to the averaged amount of mass of an element known as the Atomic Mass. 

400

What is the name of the reaction that occurs between an alkane and oxygen that creates carbon dioxide and water?

Combustion Reaction

500

Balance the following reaction: 

CH4 + O2 -> CO2 + H2O 

1 CH4 + 2 O2 -> 1 CO2 + 2 H2O