the mass number of fluorine (F) is 19
C. 19
Answer: There are 4.8 x 1024 hydrogen atoms in 2.0 moles of CH4
It would 47.7 because you would have to both minus the number together.
Solute of solution = 17.8 g
Solvn = 198 g
% = 17.8 / 198
w% = 0.089 x 100 = 8.9% by mass
hope this helps!
Answer:
They contain atoms that combine together to form molecules. In multicellular organisms, such as animals, molecules can interact to form cells that combine to form tissues, which make up organs. ... All atoms contain protons, electrons, and neutrons.