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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 82 times)

MirandaLo

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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?


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ambernicolefink

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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.


MirandaLo

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Reply 2 on: Aug 27, 2018
Wow, this really help

cpetit11

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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