The number of atoms in 2.4 g of magnesium metal is ________. ...

[nummyann]

The number of atoms in 2.4 g of magnesium metal is ________.
 
  A) 6.0  1022
  B) 3.7  1022
  C) 2.5  1022
  D) 1.7  1022

Question 2

Adding KSCN will ________.
 
  FeCl3 (aq) + KSCN (aq) = K3Fe(SCN)6 (aq) + 3KCl (aq)
   yellow colorless red colorless
  A) turn the solution more red.
  B) turn the solution less red.
  C) turn the solution clear.
  D) have no effect on the color.

Question 3

Which of the following is correct, according to Avogadro's hypothesis?
 
  A) At 0C and 1 atm pressure, equal volumes of gases contain equal masses.
  B) At 0C and 1 atm pressure, equal volumes of gases contain the same number of molecules.
  C) At 0C and 1 atm pressure, equal volumes of gases have the same density.
  D) At 0C and 1 atm pressure, 1 L of oxygen gas and 1 L of liquid water contain the same number of molecules.

[jesse.fleming]

Answer to Question 1

A

Answer to Question 2

A

Answer to Question 3

B

[nummyann]

YES! Correct, THANKS for helping me on my review

[xiazhe]

Wow, this really help