An object with a mass of 5.6 g raises the level of water in a graduated cylinder from 25.1 ml to 33.9 ml. what is the density of the object?

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.