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jenyasd209 [6]
3 years ago
7

When water evaporates, what happens to its molecules?

Chemistry
1 answer:
Scrat [10]3 years ago
7 0
It’s the first one: A. the water molecules stay the same they just change phase to a gas
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In a 35.0 L tank of N2O3 at STP, how many molecules are there?​
likoan [24]

Answer:

9.40x10^{23}molecules

Explanation:

Hello!

In this case, since we are given the volume of N2O3 and pressure and temperature for the STP (1.00 atm and 273.15 K), we can compute the moles, considering the ideal gas equation as shown below:

PV=nRT\\\\n=\frac{PV}{RT} \\\\n=\frac{1atm*35L}{0.08206\frac{atm*L}{mol*K}*273.15K}\\\\n=1.56mol

Now, by using the Avogadro's number it is possible to compute the molecules of this case in 1.56 moles:

molecules=1.56mol*\frac{6.022x10^{23}}{1mol} =9.40x10^{23}molecules

Best regards!

5 0
3 years ago
PLEASE HELP
scoundrel [369]
3.91 is the correct answer
6 0
3 years ago
Enter your answer in the provided box. The vapor pressure of ethanol is 1.00 x 10² mmHg at 34.90°C. What is its vapor pressure a
zavuch27 [327]

Answer:

2,54x10² mmHg

Explanation:

To solve this problem you can use Clausius-Clapeyron equation that serves to estimate vapor pressures or temperatures:

Ln(\frac{P_{2}}{P_{1}} ) =\frac{ deltaH_{vap}}{R} (\frac{1}{T_{1}}-\frac{1}{T_{2}} )

Where:

P1 is 1,00x10² mmHg

ΔHvap is 39,3 kJ/mol

R is gas constant 8,314x10⁻³ kJmol⁻¹K⁻¹

T1 is 34,90°C + 273,15 = 308,05 K

T2 is 54,81°C + 273,15 = 327,96 K

Thus:

Ln(\frac{P_{2}}{1,0x10^{2}mmHg}) =\frac{39,3kJ/mol}{8,314x10^{-3}kJ/molK} (\frac{1}{308,05K}-\frac{1}{327,96K} )

Thus, P2 is <em>2,54x10² mmHg</em>

I hope it helps!

3 0
4 years ago
What kind of energy does an unlit match have?​
Harman [31]

Answer:

Potential Energy

Explanation:

Right now, the match is giving off no energy to it's environment.

<em>Light</em><em> </em><em>it</em><em>.</em>

Now it's giving off a few kinds:

  • Thermal energy (heat)
  • Light energy

The match has the potential to have energy, but it currently has none.

3 0
3 years ago
When cells or organisms maintain a stable internal state in a changing environment is called?
Goryan [66]

Answer:

Homeostasis

Explanation:

8 0
3 years ago
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