The formula for oxalic acid is COOH2 How

The formula for oxalic acid is (COOH)2. How many atoms does each molecule contain? 1. 2. 3. 4. 5. 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? 1. 2. 3. 4. 5. CH 3 COOH CH 3 COCH 3 CH 2 OH CH 3 CH 2 CO 2 H CH 3 CH 2 OCH 2 CH 3 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? 1. 2. 3. 4. 5. Fe. O 3 Fe. O 2 Fe 3 O 2 Fe 2 O 3 Fe 3 O 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. 1. magnesium phosphate Mg 3(PO 4)2 2. ferrous sulfite Fe. SO 3 3. silver carbonate Ag. CO 3 4. potassium fluoride KF 5. cupric bromide Cu. Br 2 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. 2. 3. 4. 5. 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. 1. 2. 3. 4. 5. 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(NH 4)2(SO 4)2 • 6 H 2 O? 1. 2. 3. 4. 5. 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 C 6 H 6? 1. 2. 3. 4. 5. 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 (NH 4)2 Fe(SO 4)2 • 6 H 2 O? 1. 2. 3. 4. 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 Fe. SO 4. 1. 2. 3. 4. 5. %Fe = 27. 9%, %S = 24. 1, %O = 48. 0% %Fe = 16. 2% , %S = 27. 9%, %O = 55. 8% %Fe = 33. 2% , S = 9. 5% , %O = 57. 2% %Fe = 36. 8%, S = 21. 1%, %O = 42. 1% %Fe = 25. 1%, %S = 21. 6% , %O = 53. 2% 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. 36% calcium, 26. 69% sulfur, and 39. 95% oxygen? 1. 2. 3. 4. 5. Ca. SO 4 Ca. SO 2 Ca. SO 3 Ca 2 S 2 O 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

The complete combustion of a hydrocarbon produced 352 mg of CO 2 and 216 mg of H 2 O. What is the simplest formula of this hydrocarbon? 1. 2. 3. 4. 5. CH CH C 2 H 3 C 3 H 2 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 CO 2 and 5. 40 g of H 2 O. Another experiment determined the molecular weight of this hydrocarbon to be approximately 52 g/mol. What is its molecular formula? 1. 2. 3. 4. 5. C 2 H 4 CH C 4 H 4 C 2 H 2 CH 4 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, Pb. Cl 2 • 2 Pb. O? 1. 2. 3. 4. 5. 2. 89 kg 4. 05 kg 5. 05 kg 3. 68 kg 4. 33 kg 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 Na 3 A 1 F 6? (No other compounds containing fluorine are present. ) 1. 2. 3. 4. 5. 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