Question
In: Chemistry
An alloy contains 97% by mass aluminium and 3% by mass copper. 8. Using 100 kg...
An alloy contains 97% by mass aluminium and 3% by mass copper.
8. Using 100 kg of material as the starting point, what proportion of the atoms are copper?
Solutions
Expert Solution
An alloy contains 97% by mass aluminium and 3% by mass copper.
100 Kg of material containing copper = 100*(3/100)
= 3 Kg of copper
moles of copper = mass/molarmass
= 3000/63.55
= 47.21 moles
1 mole of copper contains -----> 6.023*10^23 atoms of copper
47.21 moles of copper contains ------> (6.023*10^23*47.21)
= 2.84*10^25 atoms of copper
queen_honey_blossom answered 1 year agoRelated Solutions
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