Calculate the temperature at which air possess the density equal to that of hydrogen at 0 degree celsius. Density of air at NTP is 14.4. Answer with explanation

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

In one or two grammatically correct sentences, write a definition for the term molecule geometry

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h