can someone show how to solve these? thank you 6. The substance dinitrogen triox

Question

can someone show how to solve these? thank you

6. The substance dinitrogen trioxide has the formula, N,O a) Calculate the number of N,O, molecules present in 8.43 g of dinitrogen trioxide b) Calculate the mass of nitrogen in 8.43g of N,O c) Calculate the number of atoms of oxygen in 8.43g of N,O 7. a) How many molecules of C,H,O, are in 82.60g of the substance? b) How many moles of O are in 82.60g of CHo c) How many grams of hydrogen are in 82.60g of C,H,O? 4 ISOTOPES AND THE MOLE REPORT FORM 70

Explanation / Answer

please ask the questions separtely

6)N2O3 molecular weight=76.01 g/mol

no of moles= given weight/molecular weight=8.43/76.01=0.11 moles

1 mole=6.022 x 10^23 molecules

hence 0.11 moles=x molecules

x=6.022 x 10^23 x 0.11=0.662 x 10^23 molecules

b) each mole of N2O3 has 2 moles of N.

hence 0.11x2=0.22 moles of N

mass of N=0.22 x 14 g/mol(molecular weight)=3.08 g

c) each mole of N2O3 has 3 moles of O.

hence 0.11x3=0.33 moles of O

1 mole=6.022 x 10^23 atoms

hence 0.33 moles=x atoms

x=6.022 x 10^23 x 0.33=1.987 x 10^23 atoms

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