This planet is also called Earth's "twin"
O Mercury
O Venus
O Earth
O Mars

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

Which proportionality applies to avogadro’s law?