How many moles are in 5,5 x 1023 molecules of H2O

What overall charge must all compounds have

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

All motion is caused by force? true or false