After conducting an experiment, a scientist must first .

state the problem
interpret data
draw conclusions
form a hypothesis

In an energy pyramid, which level has the most available energy?

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon

Which of these describes the rate of this chemical reaction? h2 + cl2 → 2 hcl a. an increase in the concentration of hcl and h2 with time b. an increase in the concentration of hcl with time c. an increase in h2 and cl2 with time d. a decrease in hcl and cl2 with time