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laiz [17]
3 years ago
15

The change of phase from a vapor to a liquid is called _____. evaporation condensation distillation vaporization

Chemistry
2 answers:
anastassius [24]3 years ago
5 0
Its condensation

the vapour has a lot of kinetic energy but if it cools down it loses that energy and condenses into a liquid 

hope that helps 
lesya [120]3 years ago
3 0

The answer is condensation. Hope this helps and have an amazing day. :)

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What is the mass , in kilograms of a large dog that weights 441 newton
anygoal [31]

<span>m = W/g
441 newtons/ 9.8 n/kg = 45 kg</span>

4 0
3 years ago
Determine the pH at the point in the titration of 40.0 mL of 0.200 M H₂NNH₂ with 0.100 M HNO₃ after 100.0 mL of the strong acid
Irina-Kira [14]

Answer:

pH = 1.85

Explanation:

The reaction of H₂NNH₂ with HNO₃ is::

H₂NNH₂ + HNO₃ → H₂NNH₃⁺ + NO₃⁻

Moles of H₂NNH₂ and HNO₃ are:

H₂NNH₂: 0.0400L ₓ (0.200mol / L) = 8.00x10⁻³ moles of H₂NNH₂

HNO₃: 0.1000L ₓ (0.100mol / L) = 0.01 moles of HNO₃

As moles of HNO₃ > moles of H₂NNH₂, all H₂NNH₂ will react producing H₂NNH₃⁺, but you will have an excess of HNO₃ (Strong acid).

Moles of HNO₃ in excess are:

0.01 mol - 8.00x10⁻³ moles = 2.00x10⁻³ moles of HNO₃ = moles of H⁺

Total volume is 100.0mL + 40.0mL = 140.0mL = 0.1400L.

Thus, [H⁺] is:

[H⁺] = 2.00x10⁻³ moles / 0.1400L = 0.0143M

As pH = - log [H⁺]

<h3>pH = 1.85 </h3>
6 0
3 years ago
A chemist needs to know the concentration of some NaOH that is in the laboratory. To find this out, she titrates a 50.0 mL sampl
RoseWind [281]

Answer: 2.4 M

Explanation:

According to the neutralization law,

n_1M_1V_1=n_2M_2V_2

where,

M_1 = molarity of Hl solution = 3.5 M

V_1 = volume of HCl solution = 34.3 ml

M_2 = molarity of NaOH solution = ?

V_2 = volume of NaOH solution = 50 ml

n_1 = valency of HCl = 1

n_2 = valency of NaOH = 1

1\times 3.5M\times 34.3=1\times M_2\times 50

M_2=2.4

Therefore, the concentration of NaOH solution is 2.4 M.

6 0
3 years ago
Which of these elements has two valence electrons? A.hydrogen B.barium C.nitrogen D.krypton E.bromine
Umnica [9.8K]

Answer:

Barium

Explanation:

3 0
3 years ago
Can somebody answer this please
Murrr4er [49]

The answer should be A.

7 0
3 years ago
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