Question

the largest no of molecules are in [a] 28 gram of co [b] 46 gram of ethanol [c] 36 gram of h2o [d] 54 gram of n2o5

Answer 1

Answer:

largest no. of molecules are in 36 gram of H2O i.e., 2 mole

Explanation:

no. of molecules= given mass/ molecular mass

(1.) given mass of CO= 28g

molecular mass of CO= 12+16=28 g

no of molecules of CO= 28/28 =1 mole

2. given mass of C2H5OH= 46g

molecular mass of C2H5OH=46 g

no. of molecules in C2H5OH=46/46 = 1mole

3. given mass of H2O=36 g

molecular mass of H2O=18g

no. of molecules in H2O=36/18= 2mole

4. given mass of N2O5=54g

molecular mass of N2O5=108g

no. of molecules in N2O5=0.5 mole