What’s the difference between Fe and Fe2+?

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

When would a bouncy ball have the most potential energy