Answer:
2 moles of Substance B
Explanation:
Because 1 mole of any substance contains 6.02× 10²³ particles either atoms, molecules, ions or even electron(Avogardo Constant)
Therefore 12.04 × 10²³/ 6.02× 10²³ = 2 mole of Substance B
Answer: South and Central America's hold the most of the unconventional world oil reserves.
Explanation:
I would say periodic law states that the physical and chemical properties of an element are periodic function of their atomic number
You didn't post options, but to make the sugar dissolve faster Sarah can stir the tea and/or heat it.
Hope this helped :)
