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25 Cards in this Set
- Front
- Back
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The molas mass of (NH4)2 SO4 is:
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132g
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The % of Cl in KClO is:
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29%
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The number of moles in 320g of NaOH is:
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8
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The empirical formula of a compound with a composition 65.2% Sc and 34.8% O is:
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Sc O
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The empirical formula of a compound 42.9%C and 57.1%O is:
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CO
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The molecular formula of a compound 92.3%C and 7.7%H which weighs 78g/mole is:
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C H
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The mass in grams of one molecule of CO is equal to:
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7.3 x 10 g
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The molar mass of paradichloroenzene (C H Cl ) is
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147g
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A compound is 26.8%Cr, 32.9%O and 40.3%K. The formula for this compound is:
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K CrO
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What is the mass of Carbon in 20g of C H ? hint: find % first.
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16.4g
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If I placed 100 atoms of lead and 100 atoms of copper on a scale, which would weigh more?
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lead
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Which compound has the highest % of Cl
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NaClO
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If I divide a quantity of a compound by the molar mass of that compound I will determine:
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the number of moles
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Moles are proportional to:
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atoms and molecules
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Which of these represents a molecular formula
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C H
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How many molecules are in 1 mole of neon?
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6.02 x 10
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If I have 3.6 x 10 atoms, how many moles do I have?
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6 moles
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How many particles does the molar mass of any substance contain?
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6.02 x 10
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What is the mass of 1 mole of water?
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18g
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The first step in finding the empirical formula of a compound is to:
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determine the number of moles of each element.
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When balanced, the co-efficients of this equation are:
KClO = KCl + O |
2, 2, 3
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When balanced the co-efficients of this equation are:
CH + O = CO + H O |
1,2,1,2
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When balanced, the co-efficients of this equation are:
H PO + Ca(OH) = Ca (Po ) + H O |
2,3,1,6
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How many moles of water are produced when .67 moles of NaOH H C O + 2NaOH = Na C O + 2H O
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0.67
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How many grams of aluminum are produced by the decomposition of 125g of Al O ? 2Al O = 4Al +3O
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66
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