M(H₂O) = 97,2 g.
n(H₂O) = m(H₂O) ÷ M(H₂O).
n(H₂O) = 97,2 g ÷ 18 g/mol.
n(H₂O) = 5,4 mol.
N(H₂O) = n(H₂O) · Na.
N(H₂O) = 5,4 mol · 6,023·10²³ 1/mol.
N(H₂O) = 3,25·10²⁴ molecules of water.
n - amount of substance.
Na - Avogadro number.
The answer is actually Ionization Energy. I just took the quiz.
1) i’m not positive
2) mall directory
3) mitochondria
4) cell membrane
5) organelles
Answer:
B. Substance 1 and 3.
Explanation:
1 and 3 and the elements oxygen and helium. 2 is water, a compound, and 4 is table salt, another compound