A scientist has found two samples of radioactive material. The first sample has a mass of 1.0 g and an activity of 2.0 mc022-1.jpg 109 decays per second (d/s). The second sample has an activity of 3.0 mc022-2.jpg 109 d/s. According to the Curies’ findings, what is the mass of the second sample?
1.0 g1.5 g5.0  109 g6.0  1018 g