Perform the following operation and express the answer in
scientific notation.
2.8x10-6 : 1.4x10-2
[? ]x10!?)

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

What is the mass of 8 moles of sodium atoms

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal