Sunday, June 19, 2011

p. 50-52, #13-18

13. see picture on sheet
14.
a. which models represent elements? i, vi, iv, ii
b. which models represent compounds? iii, v
15. The chemical formula provides each chemical substance and how many atoms from each element/compound are used.
16.
a. Three hydrogen atoms, one phosphorous atom, and four oxygen atoms.
b. One sodium atom, one oxygen atom, and one hydrogen atom.
c. One sulfur atom and two. oxygen atoms
17. see picture on sheet
18.
a. NaHCO3+ HCl-->NaH20CO2
b. C6H12O6+O6-->6CO26H2O

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