The solder once used by plumbers to ten copper pipes to together consists of 67% lead and 33% tin. What is the mass of lead in a 250-g block of solder?

1 Answer
Narad T.
Dec 24, 2017

See the explanation below

Explanation:

The composition of solder is

  • #67% Pb#

  • #33%Sn#

If the mass of block of solder is #=250g#

Mass of lead in the alloy is #=67/100*250=167.5g#

Mass of tin in the alloy is #=33/100*250=82.5g#

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