The phosphate salt of the antiviral drug Tamiflu contains 5 elements (C, H, O, N, and P). If the mass percent of Tamiflu is 47.17% C, 6.877 % N, 31.42% 0, and 7.603% P, what is the empirical formula of Tamiflu?

Can someone me with questions 15 to 17 plz.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

What metric units would you use to measure the thickness of a key