Answer:
0.3382 kg
Explanation:
From the illustration:
100g of the ore would contain 20.7 g of nickel by mass. In order to obtain 70.0 g of nickel, the amount of the ore needed would be:
100 x 70.0/20.7 = 338.16 g
According to conversion units:
1 g = 0.001 kg
Hence,
338.16 g = 338.16 x 0.001 = 0.3382 kg
Therefore, 0.3382 kg of the ore would be required in order to obtain 70.0 g of nickel.
Amount of core in Kilogram is 0.338 kg (Approx.)
Percentage in every ore = 20.7%
Amount of nickel = 70 gram
Amount of core in Kilogram
Amount of core in Kilogram = Amount of nickel / Percentage in every ore
Amount of core in Kilogram = 70 / 20.7%
Amount of core in Kilogram = 70 / 0.207
Amount of core in Kilogram = 338.16 gram
Amount of core in Kilogram = 0.338 kg (Approx.)
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