What is the mass in grams of 1.982 moles of calcium (Ca2+)?
What is the mass in grams of 2.047 cmol(+) of potassium (K+), where cmol(+) is the moles of charge due to the ion?
If the pH of a chemical system is 2.39, then what is the hydrogen ion activity of the system in mol H3O+/L? Please answer to at least three significant figures: This means three digits after any leading zeroes, so a good answer would have a form such as 0.0000XYZ or 0.0XYZ mol H3O+/L, where XYZ are the significant figures.