In 1/2 hour, a bicycle traveled 20 kilometers. what is the bicycle's speed?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive