Which change in oxidation number represents reduction? a) –1 to +1 b) –1 to –2 c) –1 to +2 d) –1 to 0

Compare and contrast physical changes with chemical changes.

Given the following reaction: c3h8+5o2=3co2+4h20 how many grams of co2 will be produced 7 g of c3h8 and 98 g of o2

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound