The formula for oxalic acid is (COOH)2

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Presentation transcript:

The formula for oxalic acid is (COOH)2 The formula for oxalic acid is (COOH)2. How many atoms does each molecule contain? 6 4 8 10 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

What is the molecular formula for acetic acid? CH3COOH CH3COCH3 CH3CH2OH CH3CH2CO2H CH3CH2OCH2CH3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

What is the formula for iron(III) oxide? FeO3 FeO2 Fe3O2 Fe2O3 Fe3O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Choose the name-formula pair that does not correctly match. magnesium phosphate Mg3(PO4)2 ferrous sulfite FeSO3 silver carbonate AgCO3 potassium fluoride KF cupric bromide CuBr2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

If 6.653 g of calcium combines exactly with 26.53 g of bromine and 12.29 g of zinc combines exactly with 30.04 g of bromine, what is the mass ratio of one atom of calcium to one atom of zinc? 1.68 0.613 0.541 1.85 0.133 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Calculate the number of atoms in 40.5 g of aluminum. 900 2.5 x 10-24 9.0 x 1023 6.6 x 1026 1.8 x 10-21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

What is the formula weight of Fe(NH4)2(SO4)2•6H2O? 392 amu 384 amu 412 amu 376 amu 436 amu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

How many atoms of hydrogen are there in 88 g of C6H6? 3.6 x 1023 6.8 x 1022 2.6 x 1023 4.1 x 1024 5.3 x 1023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

How many hydrogen atoms are present in 7.50 g of (NH4)2Fe(SO4)2•6H2O? 5.16 x 1022 2.30 x 1023 1.15 x 1022 4.65 x 1023 3.35 x 1024 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Calculate the percent composition of FeSO4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

What would be the empirical formula for a compound containing 33 What would be the empirical formula for a compound containing 33.36% calcium, 26.69% sulfur, and 39.95% oxygen? CaSO4 CaSO2 CaSO CaSO3 Ca2S2O5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

The complete combustion of a hydrocarbon produced 352 mg of CO2 and 216 mg of H2O. What is the simplest formula of this hydrocarbon? CH C2H3 CH3 C3H2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

The complete combustion of a hydrocarbon produced 26. 4 g of CO2 and 5 The complete combustion of a hydrocarbon produced 26.4 g of CO2 and 5.40 g of H2O. Another experiment determined the molecular weight of this hydrocarbon to be approximately 52 g/mol. What is its molecular formula? C2H4 CH C4H4 C2H2 CH4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

What mass of lead is present in 5.05 kg of mendipite, PbCl2•2PbO? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

What mass of fluorine is contained in 2.00 tons of cryolite that is 42.0% pure Na3A1F6? (No other compounds containing fluorine are present.) 912 lb 832 lb 456 lb 304 lb 152 lb 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50