Author Question: A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm. What is the molar ... (Read 39 times)

MirandaLo · **on:** Aug 27, 2018

A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm. What is the molar mass of the unknown compound?

A) 26.3 g/mol
B) 33.9 g/mol
C) 12.2 g/mol
D) 38.0 g/mol
E) 81.8 g/mol

Question 2

What happens to the density of a sample of iron metal as it is heated from room temperature to 100C? (This is below the melting point of iron.)

What will be an ideal response?

ambernicolefink · **Reply #1 on:** Aug 27, 2018

Answer to Question 1

D

Answer to Question 2

Since the mass of the iron stays constant, but the volume increases as the temperature is raised, the density of the iron decreases upon heating.