Acompound of nitrogen and oxygen is 30.46% by mass n and 69.54% by mass o. the molar mass if the compound was determined to be 92g/mol. what is the empirical formula of the compound? what is the molecular formula of the compound?

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?