Aproton and electron are 0.40nm apart what is the attraction force

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

All of the following are homogeneous mixtures except a) sugar dissolved in water. b) orange juice. c) coffee with cream. d) household vinegar. e) apple juice