How much of glucose (C6H12O6) is needed to make 1 L of a 1-M solution?

Cobalt-60 is an artificial radioisotope that is produced in a nuclear reactor and is used as a gamma-ray source in the treatment of certain types of cancer. if the wavelength of the gamma radiation from a cobalt-60 source is 1.00 × 10-3 nm, calculate the energy of a photon of this radiation.

How many atoms are there in 5.70 mol of mg

What happens to isotopes that are unstable?