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Cati moli si cate molecule de dioxid de carbon se gasesc in 440 g dioxid de carbon? (CO2)

Răspuns :

Pokju8888
440 g CO2            MCO2=12+2.16=44
moli CO2                                                                                
g CO2                 44g CO2----------1 mol CO2
                          440 g CO2-----------X moli CO2
                           x=440:44=10 moli CO2
                                                                   23
                        1mol CO2----------6,023 .10     molecule CO2
                        10 moliCO2----------Y molecule CO2
                                                 23               23
                         Y=10.6,023 .10    =60,23.10   molecule CO2

                        
Puia68
aplic relatiile cu care se calculeaza numarul de moli
-din masa : n=m/M    SI 
-din numar de particule  n= N/Na,     Na= 6,023x10²³molec/mol
M= 44g/mol---> n= 440g/44g/mol= 10 mol CO2
                         10= N/6,023X10²³----> N=60,23X10²³ molecule CO2


se putea calcula din egalitatea   m/M=N/Na

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