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MakcuM [25]
4 years ago
5

A mixture of H2 and water vapor is present in a closed vessel at 20°C. The total pressure of the system is 755.0 mmHg.

Chemistry
1 answer:
sukhopar [10]4 years ago
7 0

Answer:

737.5mmHg

Explanation:

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The kb for methylamine (ch3nh2) at 25 ∘c is 4.4×10−4. what is the value of δg at equilibrium?
Oliga [24]
Answer is: <span> </span>ΔG for <span>methylamine is 18.85 kJ/mol.
</span>ΔG = R·T·lnK.
ΔG is Gibbs energy.
<span>T is the temperature on the Kelvin scale.
R is </span><span>ideal gas constant.
R = 8.314 J/mol</span>·K.
T = 25°C = 293.15 K.
Kb = 0.00044.
ΔG = - 8.314 J/mol·K · 293.15 K · ln(0.00044).
ΔG = 18836.85 J = 18.84 kJ.

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4 years ago
Forensic biologist Manning is looking at a cell sample under the microscope. The cell she sees is oval, with a long tail or flag
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Sperm Cell

Explanation:

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Which of the following describes a substance whose atoms all have the same number of protons? . A. Compound . B. Element . C.Ion
jenyasd209 [6]
Out of the choices given, the one that describes a substance whose atoms all have the same number of protons are an element. The correct answer will be B.
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4 years ago
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Which of the following elements has the lowest ionization energy?
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3 years ago
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A 25.00 mL sample of of a sulfurous acid solution is completely neutralized using 17.12 mL of 0.13 M sodium hydroxide. What is t
Kryger [21]

Answer:

0.0445 M is the initial concentration of sulfurous acid.

Explanation:

H_2SO_3+2NaOH\rightarrow Na_2SO_3+2H_2O

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is H_2SO_3

are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=2\\M_1=?\\V_1=25.00mL\\n_2=1\\M_2=0.13 M\\V_2=17.12 mL

Putting values in above equation, we get:

2\times M_1\times 25.00 mL=1\times 0.13 M\times 17.12 mL

x=\frac{1\times 0.13 M\times 17.12 mL}{2\times 25.00}=0.0445 M

0.0445 M is the initial concentration of sulfurous acid.

8 0
3 years ago
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