How many molecules of Na2O are in 24.6g? Show work!

Question

How many molecules of Na2O are in 24.6g? Show work!

in progress 0
Thạch Thảo 3 years 2021-08-09T17:17:07+00:00 1 Answers 13 views 0

Answers ( )

  1. diemthu
    0
    2021-08-09T17:19:05+00:00
    Reply

    Answer:

    Explanation:

    Na2O has 2 atoms of Sodium and 1 atom of Oxygen

    So, the molecular mass of Na2O is:

    (2 x Atomic weight of Na) + (1 x Atomic weight of O)

    Atomic weight of Na = 22.99 g

    Atomic weight of O = 16 g

    Therefore, Molecular Mass of Na2O = (2x 22.99g) + (1 x 16g)

    = (45.98 + 16)g = 61.98 g

    Therefore 61.98 g of Na2O contains 6 x 10^23 molecules (Avogadro’s number).

    24.6 g of Na2O therefore contains:

    (24.6/61.98) x 6 x 10^23 = Answer!

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )