How many electrons does it take to weight the same as one proton?

Are bf3 and nf3 symmetrical or unsymmetrical molecules? explain.

What happens after an excited electron jumps from a lower energy level to a higher energy level? A. It permanently stays in that energy level. B. It returns to the lower energy level with the emission of a lepton. C.

An iv solution containing 1000 mg of aminophylline in 1000 ml of solution will completely infuse in 24 hours. how many mg of aminophylline is being infused per hour?

56.5 Which sources of evidence did Wegener use to support his theory of continental drift? Check all that apply. fossils land features climate change satellite mapping warm equatorial climates

How many Br-ions are present in 1 mole of FeBr3

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.

Why is it is difficult to compress a liquid? a. liquid takes the shape of its container. b. the liquid particles flow away when compressed. c. liquid becomes solid when compressed. d. the liquid particles are very close together.