After 2.00 y, 1.986 g of a radioisotope remains from a sample thathad an original mass of 2.000 g.a. Calculate the half-life.b. How much of the radioisotope remains after 10.00 y?

Can a small sample of one substance have the same mass as a large sample of a different substance?  Explain/give simple examples

The fraction recrystallized-time data for the recrystallization at 350°C of a previously deformed aluminum are tabulated here. Assuming that the kinetics of this process obey the Avrami relationship, determine the fraction recrystallized after a total time of 116.8 min. Assume y1 = 0.38 and y, = 0.73. Fraction Recrystallized Time (min) 95.2 126.6 i

check the image for question

Aluminium (Al) has a face-centered cubic structure, with lattice parameter a = 4.05 × 10^−10 m. Ifeach Al atom loses three electrons to make a free electron gas in the metal, what is the electrondensity ne?

How many Oxygen atoms would be produced from 18.75g Al(NO3)3? digit_______  (format of answer: 1.23x10^23) unit  ________   Blank 1:  Blank 2: