When nitrogen and tin (sn4+) form an ionic compound, what is the formula?

Nonpoint source pollution is difficult to control because it

How many grams of mgbr2 are needed to produce 75g or metal?

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.