need help with these two problems. thanks CSUEB Blackboard D MYCSUES SalarMavi A

Question

need help with these two problems. thanks

CSUEB Blackboard D MYCSUES SalarMavi Additional Time Used: 22 hours, 24 minutes, 43 seconds y Question Completion Status (4 pts.) Determine the molecular formula of a compound that has a molar massof N205 N203 O NO2 N204 D N306 92.0 g'mol and an empirical formula af NO2 QUESTION S9 5 ptsJ A 14.01 g sample of N2 reacts with 3,02 g of H2 to form ammonia (NH). If ammonia is the only product, what mass of ammona is formed? 1.108 3,02 g 14.01g 23.07 g 17.01 g Click Sout and Subealit ve ond subinic.

Explanation / Answer

We have molar mass = 92g/mol

empirical formula = NO2

we know that molecular formula is integral multiple of empirical formula

that integer can be obtained as = molecular mass / empirical formula mass

empirical formula mass = 14 x 1 + 16 x 2 = 46g/mol

interger i = 92g/mol / 46g/mol = 2

molecular formula = (NO2) x 2 = N2O4

9.

we know that mass is conserved and hence:

mass of reactant = mass of products

mass of reactant = 14.01 g + 3.02 g = 17.03g = mass of prodcut

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