Calculate the number of moles and molecules present in 640g of SO2?
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the molar mass of SO 2 is 32+16+16=64g/mol.
The number of moles of SO 2 present in 64 g of SO 2 is 64 /64 =1mol.
1 mole of any substance contains avogadro's number of molecules which is 6.0×10 (power)23
.Thus, the number of molecules of SO 2 present in 64 g of SO 2 is 6.0×10 23
.
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