Methanol is the substance that can be broken down by chemical means, the remaining ones are elements.
Answer:
was difficult to place isotopes of elements as they have the same chemical properties but different atomic masses. It was not possible to predict how many elements could be discovered between two heavy elements as the rise in atomic mass is not uniform.
i guess its e) Mn (VII)
if it was wrong pls let me knw
Moles of H2SO4= 7.5x10^23/ 6.02x10^23 = 1.25 (3sf) moles of H2SO4
Mass of 1 mole of H2SO4= 98.1g
Therefore mass of 7.5x10^23 molecules of H2SO4= 122.63g
Answer:
4
Explanation:
Si has atomic number 14 so the electronic configuration 2,8,4
