Hey there!
One mole contains 6.022 x 10²³ atoms.
We have 2 moles.
2.00 x 6.022 x 10²³ = 1.20 x 10²⁴
There are 1.20 x 10²⁴ atoms of oxygen contained in 2.00 moles of oxygen.
Hope this helps!
Answer:
Because the reaction is endothermic, and because of that, it is necessary to warm up the solution, to achieve more dissolution
Explanation:
The chemical reactions can be exothermic or endothermic. In the first one, the system loses heat for the surroundings, so the temperature of the surroundings is increasing, and the system is decreasing.
In the endothermic reactions, the system is absorbing heat for the surroundings, so its temperature is increasing, and the temperature of the surroundings is decreasing.
Note that the flow heat only occurs when there is a difference in temperature because the system and the surroundings intend to the thermal equilibrium. So, for exothermic reactions, to control them and let them achieve the maximum conversion, is ideal to cool down the solution, so the reaction will lose more heat; and for endothermic reactions, it is ideal to warm up the solution, so the reaction can absorb more heat.
So, the reaction of the dissolve of the antiacid tablet is endothermic, and because of that, it is necessary to warm up the solution, to achieve more dissolution.
Answer:
7.4.
Explanation:
∵ pH = -log[H₃O⁺].
∴ pH = -log(2.5 x 10⁻⁷) = 6.6.
<em>∵ pH + pOH = 14.</em>
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∴ pOH = 14.0 - pH = 14.0 - 6.6 = 7.4.
Answer:
b) increases by a factor of about 2.
Explanation:
Ignore the nitrogen and oxygen. Each gas acts independently of the others.
You have 0.02 mol of CO₂ gas at some pressure in equilibrium with the CO₂ in solution.
According to Graham's Law,
S = kp
That is, the solubility of a gas in a liquid is directly proportional to its partial pressure above the liquid.
If you add another 0.02 mol of CO₂, you have doubled the number of moles.
According to Avogadro's Law, doubling the number of moles doubles the pressure.
According to Graham's Law, doubling the pressure doubles the solubility.
The solubility of CO₂ increases by a factor of two.
By using it for a long time lol.
