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Chapter 3: Q3.126CP (page 137)

A student weighs a sample of carbon on a balance that is accurate to 卤0.001 g. (a) How many atoms are in 0.001 g of C? (b) The carbon is used in the following reaction:
Pb3O4s+Cs鈫�3PbOs+COg

What mass difference in the lead(II) oxide would be caused by an error in the carbon mass of 0.001 g?

Short Answer

Expert verified

Answer

  1. The number of C atoms in 0.001 g of C is 5脳1019Catoms

  2. The mass difference of PbO is 0.06 g PbO.

Step by step solution

01

Calculating the number of C atoms

On multiplying the given mass of C to the molar mass reciprocal and Avogadro鈥檚 number.

No.ofCatoms=0.001gC脳1molC12.01gC脳6.022脳1023Catoms1molCNo.ofCatoms=5脳1019Catoms

02

Calculating the mass difference of PbO

The mass difference can be found using,

MassdifferenceofPbO=0.001gC脳1molC12.01gC脳3molPbO1molC脳223.2gPbO1molPbOMassdifferenceofPbO=0.06gPbO

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