Molecular Geometry
Nomenclature
Percent Composition
Mole Conversions
Empirical Formulas
100

What is the bond angle(s) in a trigonal planar compound?

120 degrees

100

What is the name for NaNO3?

Sodium Nitrate

100

What is the percent composition of Hydrogen in HCl

2.8%

100

How many moles are in 15 grams of Lithium?

2.2 moles

100

An oxide of chromium is found to have the following % composition: 68.4% Cr and 31.6% O. Determine the empirical formula.

Cr2O3

200

What is the electron geometry of CH4?

Tetrahedral

200

What is the formula for Cobalt (III) Telluride?

Co2Te3

200

What is the percent composition of Oxygen in NaOH?

40%

200

How many grams are in 11.9 moles of Chromium?

619 grams

200

The percent composition of a compound was found to be 63.5% silver, 8.2% nitrogen, and 28.3% oxygen. Determine its empirical formula.

AgNO3

300

What is the molecular geometry of PCl5?

Trigonal Bipyramidal

300
What is the name for As4O10?

Tetraarsenic Decoxide

300

What is the percent composition of Nitrogen in N2S2?

30.4%

300

How many atoms are in 9.8 grams of Calcium?

1.44 x 1023 atoms

300

What is the empirical formula of a compound that contains 0.783g of carbon, 0.196g of hydrogen, and 0.521g of oxygen.

C2H6O

400

What is the bond angle(s) of a compound with the see-saw shape?

90 and 120 degrees

400
What is the formula for Perbromic Acid?

HBrO4

400

What is the percent composition of Oxygen in Al2(SO4)3?

56.1%

400

How many molecules are in 68 grams of Copper (II) Hydroxide?

4.22 x 1023 molecules

400

A 170.00g sample of an unidentified compound contains 29.84g sodium, 67.49g chromium, and 72.67g oxygen. Determine its empirical formula.

Na2Cr2O7

500

What is the molecular geometry of ClBr5?

Square Pyramidal

500
What is the name for Ru3(PO3)8?

Ruthenium (VIII) Phosphite

500
What is the percent composition of Hydrogen in (NH4)3PO4?

8.1%

500

How many atoms of Oxygen are in 929.1 grams of Mn3(SO4)7?

1.87 x 1025 atoms of Oxygen

500

A 60.00g sample of tetraethyl lead, a gasoline additive, is found to contain 38.43g lead, 17.83g carbon, and 3.74g hydrogen. Determine its empirical formula.

PbC8H21