What is 3 u in kilograms? Give your answer in scientific notation to two decimal places.
The mass of one atom of potassium-40 is 39.9640 u. What is the molar mass of potassium-40 in grams per mole? Give your answer to four decimal places.
A platinum-194 atom has a mass of 193.963 u. What is the mass of a platinum-194 atom in kilograms? Give your answer to five decimal places.