Answer:
H+ and NO3- ions
Explanation:
The Pb²+ ions react with the SO4²‐ ions to form a solid precipitate, i.e. they bond together and undergo a phase change;
On the contrary, the H+ and NO3- ions are aqueous ions before the reaction and the same after the reaction, i.e. they don't change;
Hence, the H+ and NO3- ions are spectator ions
The way to do this type of question is to consider what changes and what doesn't, look at phase changes and oxidation state changes
Answer:
Kc = 77.9
Explanation:
To solve this equilibrium problem we will use an ICE Chart. We recognise 3 stages: Initial (I), Change (C) and Equilibrium (E). We complete each row with the <em>concentration or change of concentration in that stage</em>. Since the container is of 1.00 L, the initial concentrations are [NO] = 0.103 M and [Br₂] = 9.75 × 10⁻² M and the equilibrium concentration of Br₂ is 6.21 × 10⁻² M. Then,
2 NO(g) + Br₂(g) ⇄ 2 NOBr(g)
I 0.103 9.75 × 10⁻² 0
C -2x -x +2x
E 0.103 -2x 9.75 × 10⁻² - x 2x
Also, we know that
[Br₂]eq = 9.75 × 10⁻² - x = 6.21 × 10⁻² ⇒ x = 3.54 × 10⁻² M
We can use the value of x to find the concentrations at equilibrium:
[NO] = 0.103 -2x = 0.103 - 2 . 3.54 × 10⁻² = 3.22 × 10⁻² M
[Br₂] = 6.21 × 10⁻² M
[NOBr] = 2x = 2 . 3.54 × 10⁻² = 7.08 × 10⁻² M
We can use these concentrations in the equilibrium constant (Kc) expression.
Answer:
c. liquid
Explanation:
because the are not very close if the said very closely packed together it would have been a solid
Here is the answer 3.783 x 10^24.
7. The molar mass of pottasium dichromate(K2Cr2O7) = 294 g.