Molecular Weights and Percent of Element by Mass
Not what you're looking for?
1. Calculate the molecular weight of the following compounds:
Al2(SO4)3 ____________________ SbBr5 ____________________
Fe(NO3)3 ____________________ C9H11NO2 ____________________
2. Calculate the number of moles in 25 grams of each of the following compounds:
C9H11NO2 ____________________
Al2(SO4)3 ____________________
3. Calculate the number of grams of each in 1.25 mol of the following compounds:
Fe(NO3)3 ____________________
SbBr5 ____________________
4. Calculate the percent of each element present in the following compounds:
C9H11NO2 C = __________ H = __________ N = __________ O = __________
Fe(NO3)3 Fe = __________ N = __________ O = __________
5. Determine the empirical formula for the following compounds whose % compositions are given below:
49.41% C, 4.56% H, 32.87% Br, 13.16% O ____________________
36.76% Fe, 21.11% S, 42.13% O ____________________
Purchase this Solution
Solution Summary
Molecular weights and percent of elements by mass is determined.
Solution Preview
1. Calculate the molecular weight of the following compounds:
Al2(SO4)3 = 27*2 + (32 + 16*4)*3 = 342
SbBr5 = 121.8 + 80*5 = 521.8
Fe(NO3)3 = 56 + (14 + 16*3)*3 = 242
C9H11NO2 = 12*9 + 11 + 14 + 16*2 = 165
2. Calculate the number of moles in 25 grams of each of the ...
Purchase this Solution
Free BrainMass Quizzes
Match Elements with their Symbols
Elements are provided: choose the matching one- or two-letter symbol for each element.
Functional groups in Organic Chemistry
You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.
General Chemistry - Classification of Matter
This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.
Organic Chemistry Naming: Alkanes
This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.
Thermochemistry
The quiz helps in revising basic concepts about thermochemistry.