Author Question: How many N2O4 molecules are contained in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol. A) ... (Read 560 times)

nevelica · **on:** Aug 27, 2018

How many N2O4 molecules are contained in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

A) 5.54 1025 N2O4 molecules
B) 7.26 1023 N2O4 molecules
C) 1.38 1024 N2O4 molecules
D) 4.59 1025 N2O4 molecules
E) 4.99 1023 N2O4 molecules

Question 2

If an object has a density of 8.65 g/cm3, what is its density in units of kg/m3?

A) 8.65 10-3 kg/m3
B) 8.65 10-7 kg/m3
C) 8.65 103 kg/m3
D) 8.65 101 kg/m3
E) 8.65 10-1 kg/m3