Using VSEPR what is the shape of ammonia (NH3) and water (H2O) when bonded to a hydrogen bond?
Compute the amount of heat released (absolute value) when 1.1 kg of liquid ethanol is burned in excess oxygen to make carbon dioxide and liquid water
verify the identity: (sin^3x-cos^3x)/(sinx-cosx)=1+sinxcosx
verify the identity: (1-cosx)(1+cosx)= sin^2 x
solve: tan x/2= sqrt3/ 3
What shape has perperndular line segments?