Pentru Al4C3 (carbura de aluminiu) si Al2(CO3)3 (carbonat de aluminiu) sa se afle: a) raportul numarului de atomi b) raportul de masa

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

Which of these conditions most likely produces an unstable isotope?