Percent Composition Molar Mass Molar Conversions Empirical Formulas Random

Percent Composition- 10 What is the Percent by mass of carbon in carbon monoxide (CO)?

Answer 1 – % Carbon

Percent Composition - 20 What is the percent by mass of Nitrogen (N) in NH 3 ?

Answer 1 – % Nitrogen

Percent Composition - 30 A g sample of KNO 3 contains g of Potassium (K). What is the percent by mass of the potassium in this compound?

Answer 1 – % Potassium

Percent Composition - 40 What is the percent composition of CH 3 Cl? (Include all parts)

Answer 1 – % Carbon 6.00% Hydrogen 70.21% Chlorine

Percent Composition - 50 What is the percent by mass of sulfur (S) in Al 2 (SO 4 ) 3 ?

Answer 1 – % Sulfur

Molar Mass - 10 What is the molar mass of Phosphorus (P)?

Answer 2 – g/mol P

Molar Mass - 20 What is the molar mass of sodium hydroxide (NaOH)?

Answer 2 – g/mol NaOH

Molar Mass - 30 What is the Molar Mass of Copper (II) Bromide? CuBr 2

Answer 2 – g/mol CuBr 2

Molar Mass - 40 Calculate the Molar Mass of C 2 H 5 OH.

Answer 2 – g/mol C 2 H 5 OH

Molar Mass - 50 Find the molar mass of (NH 4 ) 3 PO 4

Answer 2 – g/mol (NH 4 ) 3 PO 4

Molar Conversions - 10 How many atoms are in moles of Boron (B)?

Answer 3 – x atoms B

Molar Conversions- 20 How many moles are in a 270 g sample of HCl?

Answer 3 – mol HCl

Molar Conversions- 30 How many molecules are there in 100. g of water?

Answer 3 – x molecules H 2 O

Molar Conversions x atoms of Cobalt (Co) is how many grams?

Answer 3 – g Co

Molar Conversions - 50 What mass of Titanium (Ti) metal contains the same number of atoms in grams of Lead (Pb)?

Answer 3 – g Ti

Empirical Formula - 10 Find the empirical formula of a compound that contains 2.64 g of Nitrogen (N), and 3.01 g of Oxygen(O).

Answer 4 – 10 NO

Question A compound contains potassium (K) and sulfur (S). For every g of potassium, there are g of sulfur. What is the empirical formula of this compound?

Answer 4 – 20 K 2 S

Empirical Formulas- 30 What is the empirical formula of a compound containing g of bromine (Br), g of carbon (C), and 2.21 g of Hydrogen (H)?

Answer 4 – 30 C 3 H 7 Br

Empirical Formulas - 40 Find the empirical formula for a compound containing g of calcium (Ca), and 9.55 g of oxygen (O).

Answer 4 – 40 Ca 2 O 3

Empirical Formula - 50 In an experiment similar to the zinc chloride experiment, a student placed a piece of aluminum in hydrochloric acid. Hydrogen gas was given off, and then the liquid was evaporated off. The remaining solid, aluminum chloride was massed. Use the data below to determine the empirical formula of aluminum chloride. Mass of beaker g Mass of aluminum and beaker before reaction g Mass of aluminum chloride and beaker after reaction g

Answer 4 – 50 AlCl 3

Random - 10 What is Avogadro’s Number (a mole)?

Answer 5 – x 10 23

Random - 20 How many sulfur atoms are represented by the formula Pb(SO 4 ) 2 ?

Answer 5 – 20 2 sulfur atoms

Random - 30 If a paper clip weighs 1.12 g, a binder clip weighs 3.47 g, and a staple weighs 0.32 g, what is the relative mass of a paper clip?

Answer 5 –

Random - 40 What is the empirical and molecular formula of the following compound?

Answer 5 – 40 Empirical formula: C 2 H 5 Molecular formula: C 4 H 10

Random - 50 What T.V. show do Cesium and Iodine love watching together?

Answer 5 – 50 CsI