Which of the following are requirements for a substance to be considered a mineral? (select all that apply)
Fixed composition
Natural
Solid
Inorganic

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium