The mass of a helium-4 stone is 6.65*10^-24 grams. The mass of an electron is 9.11*10^-28 grams. How many times greater is the mass of a helium-4 atom than the mass electron? Write your answer in standard notation, rounding to the nearest tenth.
To find out how many times greater the mass of a helium-4 atom is compared to an electron, we divide the mass of the helium-4 atom by the mass of the electron:
(6.65*10^-24 grams) / (9.11*10^-28 grams) ≈ 730.7
Therefore, the mass of a helium-4 atom is approximately 730.7 times greater than the mass of an electron.