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A-gold-ore-is-found-to-have-a-purity-of-70ppm-How-much-gold-in-grams-can-be-recovered-from-5kg-of-the-ore-




Question Number 136901 by nadovic last updated on 27/Mar/21
A gold ore is found to have a purity  of 70ppm. How much gold in grams  can be recovered from 5kg of the ore?
$${A}\:{gold}\:{ore}\:{is}\:{found}\:{to}\:{have}\:{a}\:{purity} \\ $$$${of}\:\mathrm{70}{ppm}.\:{How}\:{much}\:{gold}\:{in}\:{grams} \\ $$$${can}\:{be}\:{recovered}\:{from}\:\mathrm{5}{kg}\:{of}\:{the}\:{ore}? \\ $$
Answered by Olaf last updated on 27/Mar/21
m_(pure gold)  = τm_(ore)  = 70.10^(−6) ×5.10^3  = 0,35g
$${m}_{{pure}\:{gold}} \:=\:\tau{m}_{{ore}} \:=\:\mathrm{70}.\mathrm{10}^{−\mathrm{6}} ×\mathrm{5}.\mathrm{10}^{\mathrm{3}} \:=\:\mathrm{0},\mathrm{35}{g} \\ $$
Commented by nadovic last updated on 28/Mar/21
Thank you Sir
$${Thank}\:{you}\:{Sir} \\ $$

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