Answer:
A: 11 protons and 21 neutrons
Explanation:
Hopefully this helps!
Okay thanks for the update I will give you a call when you get home thanks
Answer:
the us and the soviet union
Explanation:
<u> electrical energy to chemical energy</u>
Answer:
Explanation:
Num of molecules = num of moles * Avogadro's constant (6.02* 10^23)
But num of moles = reacting mass / molar mass
Molar mass of H20= 2*1 + 16 = 2+16 = 18g
Reacting mass of H20 = 0.55g
Therefore, num of moles of H20 = 0.55g/18g = 0.031 moles
Therefore, num of molecules of H20 = 0.031 * 6.02*10^23
= 1.87*10^22 molecules of H20
