Answer:
In the original sample there's 72.78% KCl
Explanation:
KCl(aq) + AgNO₃(aq) → AgCl(s) + KNO₃(aq)
- To solve this problem we need to calculate the mass of <em>pure</em> potasssium chloride. To do that we calculate the moles of KCl that reacted into AgCl:
1.26 g AgCl *
- Now with the molecular weight of KCl, we can calculate the mass of KCl that reacted:
8.792 * 10⁻³ mol KCl * 74.55 g/mol = 0.655 g KCl
- Finally we divide the mass of <em>pure</em> KCl by the mass of the sample, to calculate the percentage KCl:
0.655 / 0.900 * 100% = 72.78%
Your Answer would be false,
Gasses do expand because they do not have a volume. liquids do not expand to fill their container.
The complete reaction of the problem, for better illustration, is
FeO(s) + CO(g) <--> Fe(s) + CO2(g)
The double-tailed arrow signifies that the reaction is in a dynamic chemical equilibrium. When the system is in equilibrium, the forward and the backward reaction rates have an equal ratio of Kp = 0.403 at 1000°C. The formula for Kp is
Kp = [partial pressure of products]/[partial pressure of reactants]
So, first, let's find the partial pressure of the compounds in the reaction.
FeO(s) + CO(g) <--> Fe(s) + CO2(g)
Initial x 1.58 0 0
Change -1.58 -1.58 +1.58 +1.58
------------------------------------------------------------------
Equilbrium x-1.58 0 1.58 1.58
Kp = [(1.58)(1.58)]/[(x-1.58)] = 0.403
x = 7.77 atm (this is the amount of excess FeO)
Therefore, the partial pressure of CO2 at equilibrium is 1.58 atm. There is no more CO because it has been consumed due to excess FeO.
Answer:
Examples of ROS include peroxides, superoxide, hydroxyl radical, singlet oxygen, and alpha-oxygen.
The ball with greater mass will have more kinetic energy