The molar mass of a compound Al2(XO4)3 is 342. The atomic mass of ...

[natalie2426]

The molar mass of a compound Al2(XO4)3 is 342. The atomic mass of X is ________, which is ________.
 
  A) 31; P
  B) 32; S
  C) 52; Cr
  D) 55; Mn

Question 2

The equilibrium concentrations for the reaction at 300 K are Cl2 = 0.75 M, and PCl5 = 0.73 M. Based on the calculated value of the equilibrium constant, the reaction is ________.
 
  Cl2 (g) + PCl3 (g) = PCl5 (g)
  A) favorable
  B) unfavorable
  C) temperature dependent
  D) temperature independent

Question 3

When the equation below is balanced, the coefficient of silver nitrate is:
 
  Cu + AgNO3  Cu(NO3)2 + Ag
  A) 0
  B) 1
  C) 2
  D) 3

Question 4

The molar mass of a compound Ca(MO3)2 is 160. The atomic mass of M is ________, which is ________.
 
  A) 12; C
  B) 14; N
  C) 32; S
  D) 35; Cl

[TINA]

Answer to Question 1

B

Answer to Question 2

A

Answer to Question 3

C

Answer to Question 4

A

[natalie2426]

Wow, this really help

[nanny]

Excellent