The blue color in fireworks is often achieved by heating copper(I) chloride to about 1200 oC. The compound emits blue light having a wavelength of 450 nm. Determine the energy of light (in kilojoules) that is emitted.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?