What is 5.1821 x 10^-4 in standard format

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³