If i pour sodium hydroxide to copper sulfate, would this be a physical or chemical change?

Which element would mostly likely have an electron affinity measuring closest to zero

What is the full form of icc in chemistry?

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.