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Directions: Are based on the graph given below:
Solubility-Temperature relationships for various salts.
(The Y-axis denotes Solubility (kg/litre of water))

Approximately, how many kg of Potassium Nitrate can be dissolved in 10 litres of water at 30°C?

A. 0.04

B. 0.4

C. 4

D. 0.35

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