Question

(b) Which of the following samples contain more moles of metals 0.250 mol of Nacı, 0.350 mol of PbCly, and 0.450 mol ofUCI molar mass of Nace PbCl2 and uchy Nall - 58.443 gm 0.250 mol Nacex 58.443 x 22.990 gm Na imol 58.443 gm Nace - gm Na (e) Which of the following samples contain more grams of metal: 0.250 g of NaCl, 0.350 g of PbCl, and 0.450 g of UCI, 0.250g Naci mm & Nace = 58.443 gm I mol 0.250gm x 38.443m (d) Comment on why the answers in (b) and (c) are different.

Answer 1

Answer:-

These questions are answered by using simple concept of mole and its formula to calculate the mass.

The answer is given in the image,

Anneso- b) 0.250 m Mace, 0.350 mol of Phely 0.450 mol qucla so, Moles of NQ = 0.250 xinol moles of pb=0-350 mo Moleso U = 0.450 So, Ulla has more moles of metal. ©) 0.980g Mall 0.3s2go PIC2, 0.480gqU44 58-5 207.2+2x35.5 238*4*35.85 = 278.2g/mol 380gmola mass of Mas 23 x0.250 = 0.09839. 58.5*02 mass of pb=292.280-350 -0.2819. 27862 mass of U = 338 X0-450 = 0.2829. 380 0.450g UCLA has more massa U metal. (a) Because mole and many different with each other. . "