Measurements show that unknown compound X has the following composition: element mass %
carbon 74.8%
hydrogen 25.1%
Write the empirical chemical formula of X. please help

What is the mass of 0.46 mil of mgcl2

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

Which of the following is a chemical property of water at 4 c