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How many grams of Cl are in 5.0 g of PbCl2?

2007-04-19 15:05:44 · 3 answers · asked by Cameron 1 in Science & Mathematics ➔ Chemistry

3 answers

Atomic weights: Pb=207 Cl=35.5 PbCl2=277

5.0gPbCl2 x 70gCl/277gPbCl2 = 1.26gCl

2007-04-19 15:12:31 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋

Not too many. Find the mole weight of PbCl2 and the mole weight of the Cl2 dimer. Then the result is mole wt dimer/ mole wt PbCl2 x 5 grams.

2007-04-19 22:10:23 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋

atomic weight of Pb = 207.2
atomic weight of Cl = 35.45 so Cl2 = 70.9

total atomic weight = 278.1

find percentage of Cl
70.9 / 278.1 = .2549 or 25.49%

find 25.49% of 5.0g
5.0 * .2549 = 1.2745g

2007-04-19 22:23:04 · answer #3 · answered by pirate77 2 · 0⤊ 0⤋