A weather balloon is inflated to a volume of 29.9 L at a pressure of 748 mmHg and a temperature of 30.8 °C. The balloon rises in the atmosphere to an altitude where the pressure is 375 mmHg and the temperature is -13.3 °C. Assuming the balloon can freely expand, calculate the volume of the balloon at this altitude. Vialloon = %3D

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.