1 kg = 1000 g. You now have all the information required to answer your question.
Min. 2 kg mineral.
0.023 kg = 23 gTo convert from kg to g, multiply by 1000.
84.5 g equals 0.0845 kg.
4.7 kg = 4700 gTo convert from kg to g, multiply by 1000.
0.56 kg = 560 gTo convert from kg to g, multiply by 1000.