How many moles of water are produced from 0.500 moles of oxygen gas?

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

I’m an electrically neutral atomic any element, there are equal numbers of

Which statement best describes isomers? a. isomers are alcohols that have the same functional group. b. isomers have at least one carbon-carbon double bond. c. isomers have the same molecular formula but different structural properties.