MYP Chemistry Review

Scientific Notation and Significant Figures

100

How many significant figures are in the number

0.0040500?

5

200

Determine the answer for the following calculation to the correct number of significant figures:

8.05 + 8.2 = ?

16.3

300

Determine the answer for the following calculation to the correct number of significant figures: 

5.0 x 5.0 = ?

25

400

Round the number 46,847,363,684 to TWO significant digits.

4.7 x 10¹⁰

500

6.0 x 10²⁴ / 2.0 x 10²²

3.0 x 10²

Matter

100

What substance composes all matter?

Atoms

200

Salt water would be an example of what type of mixture?

Homogenous mixture

300

Which of the tests measured physical properties?

a. reaction to flame and water

b. density, phase at room temperature

c. density, reaction to flame

d. phase at room temperature, reaction to water 

b. density, phase at room temperature

400

Which of the following is an example of a chemical property of water?  It:
a.  Boils at 1000 C
b.  Has no odor
c.  Is transparent
d.  Reacts readily with calcium

d.  Reacts readily with calcium

500

Why does the water temperature not increase while water changes from the liquid phase to the gas phase?

Phase changes involve the weakening or breaking of intermolecular forces. During phase changes molecules are not vibrating any faster.

Atoms/Molecules/Periodic Table

100

Why do atoms have no electric charge?

Atoms have equal numbers of protons and electrons

200

¹⁶O, ¹⁷O, and ¹⁸O are isotopes; they have the same number of _______, but a different number of _______.

protons; neutrons

300

What is the correct formula for Iron (II) Chloride

FeCl₂

400

When bonding magnesium (Mg) and nitrogen (N), how many of each atom do you need?

Mg = 3

N = 2

500

A sample of element X contains 90% of X-35 atoms, 8.0% of X-37 atoms, and 2% of X-38 atoms. The average atomic mass will be closest to which value?

35.22 g mol^-1

Chemical Reactions

100

What is a general formula for a chemical reaction? 

Reactants yield Products

200

When hydrogen and oxygen react to form water, what type of chemical reaction is this?

Combination/Synthesis

300

What type of chemical reaction is the reaction below?

8 Al(s) + 3 Fe₃O₄(s) → 4 Al₂O₃(s) + 9 Fe(s)

Single Replacement reaction

400

What would be the products based on the reactants?

NaOH + HNO₃ --> 

NaNO₃ + HOH

500

Balance the following equation and then determine the sum of the coefficients of the products:

__Pb(NO₃)₂ → __PbO + _NO₂ + _O₂

7

Stoichiometry

100

What is a mole in chemistry?

6.02 x 10²³ atoms, molecules, particles

200

12.01 g of carbon = How many moles?

1 mol

300

Maria reacted 90.00 grams of carbon disulfide with 50.00 grams of oxygen.

CS₂ + 3 O₂  --> CO₂ + 2 SO₂

If all of the carbon disulfide had reacted, 52.02 grams of carbon dioxide would have been produced. If all of the oxygen had reacted, 22.92 grams of carbon dioxide would have been produced.  What was the limiting reactant and what was the theoretical yield?

Oxygen; 22.92 g CO₂

400

Maria reacted 90.00 grams of carbon disulfide with 50.00 grams of oxygen.

CS₂ + 3 O₂  --> CO₂ + 2 SO₂

If next time, Maria uses 45.00 grams of oxygen, what will be the new theoretical yield of carbon dioxide?

20.6 g CO₂

500

___Al(s) + __CuF₂(aq) → __AlF₃(aq)+ ____Cu(s)

If there are 4.87 moles of Cu produced, how many grams of Al reacted?

87.3 g Al