80 kg of an alloy of lead and tin contains 40% of tin. How much tin
must be melted into it to raise the percentage of tin in the alloy to 60%?
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Lyophobic colloids are liquid hating colloids (Lyo means solvent and phobic means hating). When these colloids are mixed with the suitable liquid, a very weak force of attraction exists between colloidal particles and liquid and system does not pass into colloidal state readily.
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