Which statement must be true about a chemical system at equilibrium?(1) The forward and reverse reactions stop.
(2) The concentration of reactants and products are equal.
(3) The rate of the forward reaction is equal to the rate of the reverse reaction.
(4) The number of moles of reactants is equal to the number of moles of product.
Answers
(3) is the answer. As the concentrations do not change, but the solution/system is still in dynamic equilibrium.
My answer I guess is more visual to explain
1 says --> | <--
2 is assuming because not all chemical system are the same although this could be true in some cases
3 says --> which is true because that's the def of Equilibrium
<--
4-I don't get that one-sorry
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A 1.0 m h2s solution has a ph = 3.75 at equilibrium. what is the value of ka?
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Sodium hydroxide is a very water soluble basis, undergoing ionic dissociation and releasing the ions : Na⁺ and OH⁻
hope this helps!
Answers
1 mol ------------ 22.4 L ( at STP )
7.6 mol ---------- x L
x = 7.6 * 22.4
x = 170.24 L
-----------------------------------------------------------------
For C2H3:
1 mol ------------ 22.4 ( at STP)
0.44 mol --------- y L
y = 0.44 * 22.4
y = 9.856 L
hope this helps !.
The volume of 0.44 moles of ethylene gas at STP is approximately 10.33 liters.
To calculate the volume of gases at Standard Temperature and Pressure (STP), we can use the ideal gas law:
PV = nRT
Where:
P = Pressure (at STP, it's 1 atmosphere, or 1 atm)
V = Volume (in liters)
n = Number of moles
R = Ideal gas constant (0.0821 L·atm/mol·K)
T = Temperature (at STP, it's 273.15 K)
Let's calculate the volume for each gas:
For 7.6 moles of Ar (argon):
P = 1 atm
n = 7.6 moles
R = 0.0821 L·atm/mol·K
T = 273.15 K
Now, plug these values into the ideal gas law:
V = (nRT) / P
V = (7.6 moles * 0.0821 L·atm/mol·K * 273.15 K) / 1 atm
V ≈ 172.75 liters
So, the volume of 7.6 moles of argon gas at STP is approximately 172.75 liters.
For 0.44 moles of C2H3 (ethylene):
P = 1 atm
n = 0.44 moles
R = 0.0821 L·atm/mol·K
T = 273.15 K
Now, plug these values into the ideal gas law:
V = (nRT) / P
V = (0.44 moles * 0.0821 L·atm/mol·K * 273.15 K) / 1 atm
V ≈ 10.33 liters
For more such question on ethylene gas visit:
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b. acetone
c. formaldehyde
d. arsenic
Answers
Answer:
b is the correct answer for e2020
(2) hydroxide ions as the only positive ions
(3) hydronium ions as the only negative ions
(4) hydronium ions as the only positive ions
Answers
Answer: Option (1) is the correct answer.
Explanation:
Sodium hydroxide is a strong base and when it is dissolved in water it completely dissociates into ions.
The chemical equation for this dissociation is as follows.
Therefore, we can see that sodium ions are the only positive ions and hydroxide ions are the only negative ions formed upon dissociation of NaOH in water.
Thus, we can conclude that the compound NaOH(s) dissolves in water to yield hydroxide ions as the only negative ions.
1
Answers
There are six liquids found on the periodic table.
1. Bromine
2. Mercury
3. Caesium
4. Gallium
5. Rubidium
6. Francium
Answers
Answer: First we have to understand that the normality of a solution is the gram equivalent weight of a solute per liter of solution. To find it we simply will have to have the necessary data to see the balanced equation.
I hope it helps, Regards.
Eg: H2SO4 + Na2OH ⇒ Na2SO4 + 2H2O
H2SO4 can neutralize 2 M of NaOH so equivalent of H2SO4 is 2 and that of NaOH is 1
For ions, equivalent is the number of charge and for acids or bases it is the acidity or basicity.
Equivalent weight is weight of 1 equivalent of any compound