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This quiz focuses on stoichiometric calculations and classes of chemical reactions, including synthesis reactions, decomposition reactions, and acid-base reactions.
A sample of titanium metal is placed in a crucible and heated in an oxygen atmosphere to constant weight: What is the formula of the titanium oxide?
Ti2O3
TiO
TiO2
Ti3O2
A sample of copper (II) chloride exists as a hydrate, CuCl2.xH2O. Heating 6.82 g of the hydrate to constant weight yields 5.38 g of anhydrous CuCl2. What is coefficient x?
0
2
3
5
If the molar mass of hydrated sodium sulfate is 322.1 g/mol, how many water molecules are present per sodium sulfate?
0
2
7
10
Calcium carbonate is heated to produce calcium oxide and carbon dioxide. Approximately what mass of calcium carbonate would be needed to produce 5.61 g CaO?
2g
3.87g
10g
4.5g
Which substance has chromium in the highest oxidation state?
Cr
Cr2O3
CrO3
CrCl2
One or two letters are used to represent elements.
Symbol
Yield sign
Coefficients
Subscript
How many elements are in C6H12O6?
1
2
3
4
Which of the following is a compound?
O2
Co
Co2
C
