Which of the following has the greatest mass for one mole of the compound?
A. SiH4
B. CO
C. CH3OH
D. C2H6

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

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 ?

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?