CHEM 1001/CHM 1020/ Chm1025C/CHM1032C Name:__________________
Module Five Sample Pretest
Part B: Mole calculation 0
points
Calculate the mass in grams of 1.16 x 1022 molecules of nitrogen gas, N2
calculate the number of entities in 0.641 g of oxygen gas, O2
Part
C: Percent Composition 5 points
Calculate the percent
composition of each element in the following compound:
Acetic Acid HC2H3O2
Part
D: Empirical Formula Calculation
5 points
Given the following
percent compositions, determine the empirical formula of the following compound:
54.5% carbon, 9.15% hydrogen, and 36.3% oxygen