Pre-Lab 5

Pre-Lab 5 - proportions by weight. 9. The difference...

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Frank Gervasi 10/11/10 Experiment 5 1. Lead: Pb, Iron: Fe, Fluorine: F, Potassium: K 2. KBr: 119 g/mol, NiCO 3 : 118.7 g/mol 3. A substance formed by the reaction of two or more chemical elements. The elements in a compound are present in fixed ratios. 4. CH 2 5. 3Al(s) + 3Cl 2 (g) 3AlCl 3 (s) 6. Ca: 40.04%, C: 12.00%, O: 47.96% 7. SnCl 4 8. Every pure substance always contains the same elements combined in the same
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Unformatted text preview: proportions by weight. 9. The difference between the empirical and the molecular formula is the subscripts. The molecular formula gives the number of atoms present in the compound. The empirical formula gives the ratio of atoms in a compound. 10. 72.83g of CaH 2 11. 12. Empirical formula: C 4 H 4 O, Molecular formula: C 8 H 8 O 2 13. fs 14. 6.05 x10 21 atoms of sodium...
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