1) If 400 grams of ethane(C2H6) goes through complete combustion, how many grams of oxygen would be
needed?
balanced
Equation: 2 C2H6 + 702 → 4 CO2 + 6 H20

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this