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aksik [14]
3 years ago
10

Which sample of water has the lowest vapor pressure?

Chemistry
1 answer:
Serggg [28]3 years ago
4 0

Answer:

400 ml at 20⁰C

Explanation:

VP ∝ Temp => Increasing temperature increases VP or decreasing temperature decreases VP. VP is independent of the quantity of liquid in consideration. Therefore, the sample at the lower temperature would have the lowest VP; i.e., 400-ml at 20⁰C.

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What is the hydrogen ion concentration in a 0.10M solution of KOH?​
dybincka [34]

KOH is a strong base, so [OH-] = 0.10 M = 1.0 x 10^-1 M

[H+][OH-] = Kw

Kw = 1.0 x 10^-14

[H+] = 1.0 x 10^-14 / 1.0 x 10^-1 = 1.0 x 10^-13 M

7 0
3 years ago
Jet fuel has a melting point of -48° C and a boiling point of 163°C
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Solid since it is cold
6 0
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Ammonium sulfate is used as a fertilizer to supply nitrogen to crops. Write the equation for the disassociation of this compound
aksik [14]

Answer:

(NH₄)₂(SO₄)+H₂O⇒(NH₄)₂O+H₂(SO₄)

Explanation:

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(NH₄)₂(SO₄)+H₂O⇒(NH₄)₂O+H₂(SO₄)

5 0
3 years ago
Which set of these comparisons is incorrect? (more stable means it has a more negative energy.)
Lady bird [3.3K]
I think your anwser ahould be b!
4 0
3 years ago
According to bond energy tables, the triple bond of N2 is 946 kJ/mol while the bond of I2 is 151 kJ/mol. Based on simple chemica
Dmitry_Shevchenko [17]

Answer:

Yes, in both cases the reactant bond must be broken before the H can bond.

Explanation:

Let us remind ourselves of the basics of the collision theory. According to this theory, chemical reaction occurs because of the collision of particles of substances in a chemical reaction system.

This means that the bond between reactants must first be broken and new bonds formed in products. Activation energy is the minimum energy required for a reaction to occur. This energy goes into the rearrangement of reactant bonds to enable them to recombine and form products.

Since the N2 bond energy is far higher than the I2 bond energy, a greater degree of energy is needed overcome the energy barrier in the reaction of H2 with N2 compared to the reaction of H2 and I2 . Therefore, the activation energy for the reaction of H2 and N2 is much higher than the activation energy for the reaction of H2 with I2.

4 0
3 years ago
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