How many moles of calcium atoms do you have if you have 7.88 × 10²¹ atoms of calcium. (The mass of one mole of calcium is 40.08 g.)

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

When would a bouncy ball have the most potential energy

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li