Among the following choose the ones with equal number of atoms. A. 212 g of Na _2 CO _3( ~s ) [molar mass =106 ~g ] B. 248 g of Na _2 O (s) [molar mass =62 ~g ] C. 240 g of NaOH ( s ) [molar mass =40 ~g ] D. 12 g of H _2( ~g ) [molar mass =2 ~g ] E. 220 q of CO _2( q ) [molar mass .=44 ~g ] Choose t

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Among the following choose the ones with equal number of atoms. A. 212 g of Na _2 CO _3( ~s ) [molar mass =106 ~g ] B. 248 g of Na _2 O (s) [molar mass =62 ~g ] C. 240 g of NaOH ( s ) [molar mass =40 ~g ] D. 12 g of H _2( ~g ) [molar mass =2 ~g ] E. 220 q of CO _2( q ) [molar mass .=44 ~g ] Choose the correct answer from the options given below:

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Correct answer: B. A, B and D only

No. of atoms = Atomicity mole N _ A (A) No. of atoms =6 212 106 N _ A =12 ~N _ A (B) No. of atoms =3 248 62 N _ A =12 ~N _ A (C) No. of atoms =3 240 40 N _ A =18 ~N _ A (D) No. of atoms =2 12 2 N _ A =12 ~N _ A (E) No. of atoms =3 220 44 N_A=15 N_A

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