7. A 35.0L sample of dry air at 750torr is compressed to a volume of 20.0L. What is the final pressure of the gas (in torr) if the temperature and number of moles remains constant? a) 429 torr b) 1050 torr 8. Consider the following reaction: c) 1312 torr d) 375 torr C₂H4(g) + 302(g) → 2CO2(g) + 2H₂O(g) If 5L of carbon dioxide gas are produced, how many litres of oxygen gas reacted? a) 5 litres c) 7.5 litres d) 10 litres b) 3.3 litres

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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.