Question

At STP 11.2L oxygen is needed to convert a 6g solid element 'A' to its gaseous oxide completely. If the volume of that oxide produced be 11.2L at STP, find the molecular mass of that oxide.[O = 16] Please slove this sum please..........​

Answer 1

Answer:

While the previous apprach could have been used, when the system is at STP, you dont have to use PV = nRT. All you need to know is at STP 1 mole of an ideal gas = 22.4 liters. Thus, 11.2 L x 1 mol/22.4 L = 0.5 moles

0.5 moles x 32 g/mole = 16 g.  

You were correct. 

The previous answer has several errors. First , n = 0.499 =0.5 mokes, not 0.0446. Second error is that molar mass of O2 is 32 g, not 16 g. 

Step-by-step explanation:

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