If it takes 1400 calories to melt 30 g of a substance, what is its heat of fusion? * A. 31.2 cal/g
B. 46.7 cal /g
C. 61.3 cal/g
D. 78.5 cal /g

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this