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melamori03 [73]
3 years ago
15

A rigid cylinder with a movable piston contains a sample of hydrogen gas.

Chemistry
1 answer:
Anettt [7]3 years ago
6 0

Answer:

jhoih hioih htg

Explanation:

pop in my head ahhhh hello went y

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Dry, white powder, soluble in water to form a slightly basic solution
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What is the molarity of NaCL solution that has 58 grams of NaCL dissolved in 4.0 liters of water
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14.5 M

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M=58/4.0
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What is the equilibrium associated with ka3 for h3po4?
Vlad [161]
Phosphoric acid has 3 pKa values (pKa1=2.1,  pKa2=6.9, pKa3= 12.4) and after 3 ionization it gives 3 types of ions at different pKa values: 

H₃PO₄(aq) + H₂O(l) ⇌ H₃O⁺(aq) + H₂PO₄⁻ (aq)         pKₐ₁ 
<span>

</span>H₂PO₄⁻(aq) + H₂O(l) ⇌ H₃O⁺(aq) + HPO₄²⁻ (aq)       pKₐ₂


HPO₄²⁻(aq) + H₂O(l) ⇌ H₃O⁺(aq) + PO₄³⁻ (aq)          pKₐ₃ 

The last equilibrium is associated with the highest pKa value (12.4) of phosphoric acid. There the last OH group will lose its hydrogen and hydrogen phosphate ion (HPO₄²⁻) turns into phosphate ion (PO₄³⁻).
4 0
4 years ago
Read 2 more answers
5.54 moles of AgNO3 are dissolved in 0.48 L of water. What is the molarity of the AgNO, solution?
expeople1 [14]

Answer:

11.54 M

Explanation:

In this case, all we have to do is to apply the following expression:

M = n/V

M: molarity

n: moles

V: volume of solution in liters

In this case, we can assume that the volume of water will be the volume of solution. This is because the problem is not specifing if the moles of AgNO3 are liquid or solid, so we can make a safe assumption of the volume.

Using the expression above we have:

M = 5.54 / 0.48

M = 11.54 M

This is the molarity of solution

7 0
4 years ago
Read 2 more answers
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