7. Which is NOT a principle of the cell theory?
SC.6.L.14.2
A. All living things are made of one or more cells.
B. The cell is the basic unit of life.
C. All cells are exactly the same.
D. All new cells come from preexisting cells.

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?

Chemistry worksheet - i am not sure what they are asking for exactly?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?