Stoichiometry and Molecular Calculations

Front

Calculate the mass percent of oxygen in C₈H₁₄O₂

Back

22.5% Oxygen

Front

How many grams are in 2.03 x 10²³ molecules of CO₂

Back

14.8 g CO₂

Front

What is the empirical formula for the molecule in the image.

Back

C₄H₉

Front

At STP, how much space would 20.5 g of water vapor occupy?

Back

25.5 L

Front

How many molecules are in 2.5 moles of zinc?

Back

1.51 x 10²⁴ molecules Zn

Front

If you have 40.00 % C, 6.71 % H, and 53.29 % O in a compound. What is the empirical formula?

Back

CH₂O

Front

A compound has an empirical formula of NH₄ and a molar mass of 72.11 g/mol. What is the molecular formula?

Back

N₄H₁₆

Front

How many grams of Ba(OH)₂ are in 1.77 moles Ba(OH)₂?

Back

303 moles

Front

Calculate the molar mass of Sc(HCO₃)₃

Back

192.02 g/mol

Front

How many molecules of N₂ gas are present in 10.2 L of N₂ gas.

Back

2.74 x 10²³ molecules