How many different biochemicals were detected in samples from potatoes.
a. 5
b. 2
c. 3
d. 4

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

What are the similarities of physical and chemical change ?

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90