SI Units Test Review

Units of Measurement

100

What is the SI base unit for mass?

the gram (g)

200

What is the tool to measure length in cm?

ruler

300

The SI unit used to measure distance or length is the

meter (m)

400

Which mass unit is largest?

gram (g),    kilogram (kg),    or   milligram (mg)

kilogram (kg)

500

What are units of volume for a liquid?

What are the units of volume for a solid?

volume of liquid = Liter (L)  or milliLiter (mL)

volume of solid =  m³    or   cm³

Mass, Volume, Density

100

The measure of the amount of matter in an object is

mass

200

The measure of 3-D space an object occupies is called

volume

300

The amount of mass per given volume which can be calculated as 

mass / volume  = ?

density

400

What is the density of the unknown substance if the mass is 10g and the volume is 5 mL?

D = m / V

Include units!

100 / 5  = 2 g/mL

500

What is the ratio of elements in the following compounds?  What is the difference in compounds?

CO

CO₂

CO 1:1

CO₂  2:1

Carbon monoxide vs carbon dioxide

Laws in Chemistry

100

Mass cannot be created nor destroyed during physical and chemical changes

Law of Conservation of Mass

200

If two compounds are made of the same two elements, the element will combine in small whole number ratios to give rise to different compounds.

Law of Multiple Proportions

300

Elements of a compound will combine in exactly the same proportions by mass regardless the size of the sample

Law of Definite Proportions

400

During a chemical reaction...

 the mass before is  _______________ the mass after

equal to

500

Where should you read the meniscus from to get the correct volume of the liquid you are measuring?

from the bottlom

The Mole

100

The counting unit that represents amount of substance

The mole (mol)

200

grams per mole (g/mol) is the unit for

molar mass

300

What is Avogadro's number?

The amount of particles or atoms in 1 mole

6.02 x 10²³ atoms

400

Complete the missing parts....

___________  =  1 mole   =   _________ atoms

molar mass = 1 mole = 6.02 x 10^{23 atoms}

500

What is the molar mass of Carbon?

How many atoms are in this amount of carbon?

12.01 g/ mol

6.02 x 1023 atoms

Periodic Table & The Atom

100

The atom is defined as

simplest unit of all matter

200

What are the three subatomic parts that make up the atom?

protons neutrons electrons

300

Which element has an atomic number of 79?

Gold (Au)

400

What is the molar mass of O₂

2 x 16 = 32 g/mol

500

Which element has the symbol Mg?  What is the atomic number and the molar mass of Pb?

Magnesium

Atomic # = 12

Molar mass = 24.3 g/mol