How many anions are there in 2.50 g of MgBr2? A) 8.18 1021 ...

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How many anions are there in 2.50 g of MgBr2?
 
  A) 8.18  1021 anions
  B) 1.64  1022 anions
  C) 4.43  1025 anions
  D) 8.87  1025 anions

Question 2

Using the following abbreviated spectrochemical series, determine which complex ion is most likely to absorb light in the red region of the visible spectrum. small splitting Cl- < H2O < NH3 < CN- large splitting
 
  A) CuCl42-
  B) Cu(H2O)42+
  C) Cu(NH3)42+
  D) Cu(CN)42-
  E) not enough information given to determine

Question 3

A solution is prepared by dissolving 27.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is ________ by mass.
 
  A) 6.88
  B) 7.22
  C) 0.0722
  D) 0.0688
  E) 6.24

[maya.nigrin17@yahoo.com]

Answer to Question 1

B

Answer to Question 2

A

Answer to Question 3

A

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Wow, this really help

[Sarahjh]

Gracias!