Question

(a)Calculate the number of molecules of SO2 present in 44g of it. (b)If one mole of oxygen atoms weigh 16 grams find the mass of one atom of oxygen (in grams). Urgent i had test tomorrow

Answer 1

SO2 = 32 + 16X2 = 64

(a)
⇒ 64 g of SO2 has 6.02 x 10∧23 molecules (Avogadro's No.)

∴ 44 g = (44 x 6.02 x 10∧23)/64
             = 4.14 x 10∧23 molecules
(b) one mole has 6.02 x 10∧23 atoms

Mass of one atom = 16 / (6.02 x 10∧23)
                                 = 2.66 x 10∧-23 g

Answer 2

Answer:

thanks for answer mja agya