One twelfth of the mass of a carbon-12 atom is used to define a

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.