The rms speed of a certain sample of carbon dioxide molecules, ...

[tnt_battle]

The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44g/mole, is 396 m/s. What is the rms speed of water molecules, with a molecular weight of 18 g/mol, at the same temperature?
 
  A) 253 m/s
  B) 387 m/s
  C) 421 m/s
  D) 506 m/s
  E) 619 m/s

Question 2

An object is placed a distance d in front of a plane mirror. The size of the image will be
 
  A) dependent on the distance d.
  B) half as big as the size of the object.
  C) twice the size of the object.
  D) dependent on where you are positioned when you look at the image.
  E) the same size as the object, independent of the distance d or the position of the observer.

[jxjsniuniu]

Answer to Question 1

E

Answer to Question 2

E

[tnt_battle]

TYSM

[Dominic]

Excellent