Which of the following statements related to a mole are true? Select all that apply. A A mole is used to simplify the counting of atoms.
B. Representative particles can only be atoms.
C. Amole is used to simplify the counting of electrons.
D. Representative particles can be atoms, molecules, or formula units.
E. The number of representative particles in a mole (6.02 x 1023) is called Avogadro's number.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)

The energy that powers a hurricane is derived from

When utilizing a transmission electron microscope, why is it necessary to stain the specimen with heavy metal salts?