Chem Final Test Answers – Flashcards
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The correct name for CaH2 is
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Calcium hydride
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The correct name for N2O5 is
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dinitrogen pentoxide
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The correct name for HClO3 is
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chloric acid
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The correct formula for molybdenum(IV) hypochlorite is
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Mo(ClO)4
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When the following equation is balanced, Ca(s) + H2O(l) --> Ca(OH)2(aq) + H2, the coefficient of H2O is
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2
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What is the coefficient of O2 when the following equation, c4h8o2 + O2 --> ________, is completed and balanced?
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5
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Predict the product in this combination reaction below, Al(s) + N2(g) --> _______
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AlN
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There are ______ mol of carbon atoms in 4 mol of C4H8O2
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16
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How many moles of carbon monoxide are there in 36.55g of carbon monoxide?
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1.305
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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?
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C8H8O2
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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?
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C3H3O
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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.
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1.5
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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?
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2.09
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A 3.82-g sample of magnesium nitride is reacted with 7.73 g of water, Mg3N2
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