What did the invention of the scanning tunneling microscope allow scientists to do for the first time?
a) observe individual atoms
b) create new kinds of atoms
c) identify particles inside atoms
d) increase the size of atoms

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j

Why do lunar and solar eclipse not happen every month

How many grams of sodium chloride are in 250ml of a 2.5m naci solution