Chem Final Test Answers

Flashcard maker : Lily Taylor
The correct name for CaH2 is
Calcium hydride
The correct name for N2O5 is
dinitrogen pentoxide
The correct name for HClO3 is
chloric acid
The correct formula for molybdenum(IV) hypochlorite is
Mo(ClO)4
When the following equation is balanced, Ca(s) + H2O(l) –> Ca(OH)2(aq) + H2, the coefficient of H2O is
2
What is the coefficient of O2 when the following equation, c4h8o2 + O2 –> ________, is completed and balanced?
5
Predict the product in this combination reaction below, Al(s) + N2(g) –> _______
AlN
There are ______ mol of carbon atoms in 4 mol of C4H8O2
16
How many moles of carbon monoxide are there in 36.55g of carbon monoxide?
1.305
A compound that is composed of carbon, hydrogen, and oxygen contains 70.6% C, 5.9% H, and 23.5% O by mass. The molecular weight of the compound is 136 amu. What is the molecular formula?
C8H8O2
A compound is composed of only C,H, and O. The combustion of a 0.519-g sample of the compound yields 1.24 g of CO2 and 0.255 g of H2O. What is the empirical formula of the compound?
C3H3O
The combustion of propane (C3H8) in the presence of excess oxygen yields CO2 and H2O: C3H8(g) + 5O2(g) –> 3CO2(g) + 4H2O(g). When 2.5 mol of O2 are consumed in their reaction _____ mol of CO2 are produced.
1.5
Lead(II) carbonate decomposes to give lead(II) oxide and carbon dioxide: PbCO3(s) –> PbO(s) + CO2(g). How many grams of lead (II) oxide will be produced by the decomposition of 2.50g of lead(II) carbonate?
2.09
A 3.82-g sample of magnesium nitride is reacted with 7.73 g of water, Mg3N2

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