Question

Calculate the number of molecules of carbon di oxide present in 4.4 g
of CO2(Atomic mass of C=120,0=160, NA=6.022x10²³)?​

Answer 1

Answer:

Weight of CO2 in gram per moles =(12) + (16*2) = 12+32 = 44 g/moles.

Now, for 4.4 grams of CO2, we get:

4.4/44 = 0.1 moles

Now, number of molecules:-

0.1 x 6.022 x 1023 = 0.6022 x 1023 = 6.022 x 1022 molecules.

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