IB Chemistry Topic 1.2

Measuring Matter

100

Avogadro's Number

What is the number 6.0221367x10^23, which is the number of representative particles in a mole, and can be rounded to 3 significant digits 6.02x10^23 called?

200

0.595mol ZnCl2 (atoms to Moles)

State the conversion and solve the problem. 3.58x10^23ZnCl2

300

Define Mole

What is the SI base unit used to measure the amount of a substance?

400

How do we find the molar mass of a compound?

Add up the Masses of each individual element

500

What are Representative Particles

GMA

The A in GMA?

Atoms

Molecules

Ions

Formula Units

Percent Composition

100

What is the percent composition of Br in NaBr

77.7%

200

the percent composition of phosphoric acid(H3PO4)?

What is 3.08%H, 31.61%P, 65.31%O

300

The % composition of Na in NaBr

What is 22.3%

400

Is the percent composition of O larger in CO2 or NO2

What is CO2

500

Define Percent Composition

Mass of the Element / Mass of the Compound 

The Multiple by 100

Moles of Compounds

100

5.93g is how many moles of ZnCl2

What is the mass of 4.35x10^-2 mol of zinc chloride(ZnCl2)?

200

How many Moles are in a sample of 45 grams of Lithium?

6.42 Moles

300

0.0403mol is how many grams of ZnSO4

What is 6.50g ZnSO4

400

How many atoms in 2 mol of C

What is 1.204*10^24

500

How atoms are 45 grams of O₂ ?

7.91 x 10 ²³ Atoms

Grams Moles Atoms

100

Convert 45 Grams of Water to Molecules

1.5 x 10 ²⁴ Molecules

200

Convert 4.96 x 10 ²³ atoms of Lead to Moles

0.82 Moles

300

Convert 4.78 Grams of Helium to Atoms

7.19 x 10 ²³  Atoms

400

Convert 8.45 x 10 ²³  molecules of Carbon Dioxide to Grams

61.76 grams

500

Convert 88 Grams of Carbon Monoxide to Moles

3.14 Moles of CO

Molar Mass

100

What is the molar mass of CH3

15 g/mol

200

What is the molar mass of NH3OH

34 g/mol

300

What is the Molar Mass of H₃PO₄

98 Grams

400

the molar mass of C6H6

78g/mol

500

What is the molar mass of SO4

96 g/mol

Writing EF from MF

100

What is the EF from the MF of

P₄O₆

P₂O₃

200

What is the EF from the MF?

 CH₂OHCH₂OH

CH₃O

300

What is the EF from the MF?

C₆H₉

C₂H₃

400

What is the EF from the MF?

C₁₀H₂₂

C₅H₁₁

500

What is the EF from the MF?

Hg₂F₂

HgF

EF

100

A compound composed of: 72% iron and 27.6% oxygen by mass.

Fe₃O₄

200

A compound composed of: 9.93% carbon, 58.6% chlorine, and 31.4% fluorine.

CCl₂F₂

300

A compound composed of: .556g carbon and .0933g hydrogen.

CH₂

400

A compound with a molecular mass of 70g/mol and an empirical formula of CH₂.

C₅H₁₀

500

A compound with a molecular mass of 46.0g/mol and an empirical formula of NO₂

NO₂

Molecular Formulas

100

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C₂OH₄ and a molar mass of 88 grams per mole

C₄O₂H₈

200

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C₄H₄O and a molar mass of 136 grams per mole.

C₈H₈O₂

300

Write the molecular formulas of the following compounds:

A compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole.

C₂F₂Br₂O₂

400

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C₂H₈N and a molar mass of 46 grams per mole.

C₂H₈N

500

What is the Molecular Formula?

The Molecular Formula is the true formula based off the Molar Mass of the Compound