How many moles of iron in a sample that contains 7.91 x 10^23 atoms of iron?

Why does blue let scatter more easily that red?

Which state of matter has a constant volume, but changes shape?/?

Are atoms mostly empty space

A picnic blanket is 1 meter across. An ant is 1 centimeter in length. How many ants of the same length would fit end to end across the length of the picnic blanket

Fluorine 20 undergoes beta decay

Select the more electronegative element in each pair. a. Cl or Fb. Se or Oc. N or Asd. Na or Mg

Find the molar mass of potassium dichromate, K2Cr2O7

Zn (s) + cu2 + (aq) →zn2 + (aq) + cu (s). part a under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 51.0 g of copper is plated out?

13 This word describes the circulatory system that provides nutrients and oxygen to living cells of the body.

Write the outer electron configuration for the group 15 element in the fourth period.