2. Jonah is completing the table shown below. What are the best headings for Columns A and Columns B? Column
Com
Na
Naci
Ca
CaCl
Ft,
Fe
Pb
PEN
a. Column A: Atoms; Column B: Mixtures
b. Column A: Molecules; Column B: Atoms
C Column A: Elements; Column B: Compounds
d. Column A: Atoms; Column B: Elements
Answer
B 500 (8 P 8A

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

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