Simple Question

[mh922253]

Hi everyone i have a physics question..... the question is:
Estimate the number of water molecules in a raindrop 1.5 mm in radius.
i really dont...
WHAT IS THE MOLAR VOLUME OF WATER????

[LeonhardEuler]

There is one gram in a mililiter of water and 18 grams in a mole of water, so I'd say there is one eighteenth of a mole of water in a milileter of water.