If it takes 41000 joules of heat to melt 200 grams of solid copper to liquid copper, what is the heat of
fusion of copper?

Balance this equation: n2 + h2 > nh3, write the following molar ratios: n2 / n2 / nh3 h2 /

Which substances have the lowest melting points: ionic covalent, or metallic

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?