Which one of the following polyatomic ions has the same charge as ...

[rayancarla1]

Which one of the following polyatomic ions has the same charge as the hydroxide ion?
 
  A) ammonium
  B) carbonate
  C) nitrate
  D) sulfate
  E) phosphate

Question 2

The value of H for the reaction below is -1107 kJ: 2Ba (s) + O2 (g)  2BaO (s) How many kJ of heat are released when 5.75 g of Ba (s) reacts completely with oxygen to form BaO (s)?
 
  A) 96.3 kJ
  B) 26.3 kJ
  C) 46.4 kJ
  D) 23.2 kJ
  E) 193 kJ

Question 3

When two elements combine to form a compound, the greater the difference in metallic character between the two elements, the greater the likelihood that the compound will be ________.
 
  A) a gas at room temperature
  B) a solid at room temperature
  C) metallic
  D) nonmetallic
  E) a liquid at room temperature

[jackie]

Answer to Question 1

C

Answer to Question 2

D

Answer to Question 3

B

[rayancarla1]

Excellent

[Dinolord]

Gracias!