Author Question: A compound is found to be 30.45 N and 69.55 O by mass. If 1.63 g of this compound occupy 389 mL at ... (Read 60 times)

torybrooks · **on:** Aug 27, 2018

A compound is found to be 30.45 N and 69.55 O by mass. If 1.63 g of this compound occupy 389 mL at 0.00C and 775 mm Hg, what is the molecular formula of the compound?

A) NO2
B) N2O
C) N4O2
D) N2O5
E) N2O4

Question 2

How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.

A) 1.52 1027 sodium ions
B) 4.76 1020 sodium ions
C) 2.10 1021 sodium ions
D) 1.05 1021 sodium ions
E) 9.52 1020 sodium ions