How many N2O4 molecules are contained in 76.3 g N2O4? The molar ...

[nevelica]

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

[matt95]

Answer to Question 1

E

Answer to Question 2

C

[nevelica]

TYSM

[irishcancer18]

Gracias!