CHEM 1F92 Assignment 4. Stoichiometry, Oxidation-Reduction
Assignment 4, Version No.
Many important metals occur as sulfide, arsenide, and antimonide minerals, especially in the Sudbury
mineral complex. The first step in processing these ores invol
CHEM 1F92 Assignment 5. Reactions in Aqueous Solution; Solution Stoichiometry and Analysis
Assignment 5, Version No.
(a) Write balanced molecular equations for the following potential precipitation reactions. Indicate
the states of reactants and pr
CHEM 1F92. Assignment 2. Atomic Structure, Naming, Formulas
Assignment 2, Version No.
In an atom of
(a) What is the atomic number?
(c) How many protons are there?
(e) What is the mass number?
(b) How many neutrons are there?
(d) How many
CHEM 1F92. Assignment 3. Chemical Reactions, Stoichiometry
Assignment 3, Version No.
Suppose you want to know the formula of a hydrate of magnesium nitrate. If you heat 1.263 g of the
hydrate until all of the water is vaporized, the mass of anhydro
CHEM 1F92 Assignment 7. Atomic Structure
Assignment 7, Version No.
Plancks constant h = 6.6256 x 10-34 Jsec; speed of light c = 2.9979 x 108 m/s
For electromagnetic radiation with a wavelength of 379.6 nm:
(a) What is the frequency of the radiation
CHEM 1P91 Assignment 9 (Chemical Bonding). Version # 203
Which one of the following compounds is covalent?
Cl 2 O
NH 4 Br
Al 2 (SO 4 ) 3
Fe 2 O 3
Draw the Lewis structures for each of the following ions or molecules. Give the number of electrons
CHEM 1F92 Assignment 8. Electronic Configurations and Periodicity
Assignment 8, Version No.
An element has the following electronic configuration: [Kr]4d75s2
(a) What period does it belong to?
(b) What is its group number? (Use group numbers from 1
CHEM 1P91 Assignment 10. Structure and Bonding
Assignment 10, Version #203
Questions 1, 2, and 5: If there are 3 elements in the molecule, the first atom is the central atom and the
others are bonded to it.
Draw the Lewis structures for each of the fol
CHEM 1F92 Assignment 1. Matter and Measurement
Assignment 1 Version #203
Report all numerical answers to the correct number of significant figures!
(a) Give the names of the following elements: (i) W (ii) Cr
(b) Give the symbols of the following elemen