Answer:
you ask questions that are too hard!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
Explanation:
These graphs compare the people who oppose the use of nuclear energy to the people
who support the use of nuclear energy.
Which country has the most people that favor the use of nuclear energy, based on these
graphs?
The United States
Sweden
Finland
Favors use of nuclear energy
Opposes use of nuclear energy
The United States
Finland
Sweden
Answer:
The correct answer is: Sweden
I just submitted my test with this question on it and it said the right answer was Sweden. When you look at the graphs the one with the most dark blue has the most supporters. Sweden has the most dark blue.
Hope this is helpful, please mark me Brainliest if i got it right :)
Explanation:
A buffer that contains 0.34 M of an acid, HA and 0.37 M of its conjugate base A-, has a pH of 3.26. What is the pH after 0.032 mol of HCl are added to 0.71 L of the solution
Answer: pH ≈ 3.186
Explanation:
[tex]p^{H} &=p^{k a}+\left[\frac{A^{-}}{H A}\right] \\3.26 &=p^{k a}+ \log \frac{0.37}{0.34} \\3.26 &=p^{k a}+\log\ 1.089 \\3.26 &=p^{k e}+0.037 \\p^{k a} &=3.26-0.1105 \\p^{k a} &=3.1495[/tex]
[tex]$0.34 \frac{\mathrm{mol}}{2} \times 0.71 \mathrm{~L}=0.2414 \ {\mathrm{mol} \rightarrow HA \\\\[/tex]
[tex]$0.37 \frac{\mathrm{mol}}{2} \times 0.71 \mathrm{~L}=0.2627 \ {\mathrm{mol} \rightarrow A^{-} \\\\[/tex]
[tex]$0.2414-0.032 \mathrm{mol}=0.2094 \mathrm{\ mol} \ HA[/tex]
[tex]$0.2627+0.032 \mathrm{mol}=0.2947 \mathrm{\ mol} \ A^{-}[/tex]
[tex]\begin{aligned}&p H=3.1495+\log\frac{0.2627}{0.2414} \\&p H=3.1495+0.0367 \\&p H=3.186\end{aligned}[/tex]
Therefore, the pH after 0.032 mol of HCl are added to 0.71 L of the solution is approximately 3.186
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures wide 22cm and 26.4 high. The maximum safe pressure inside the vessel has been measured to be 6.30mpa.
For a certain reaction, the vessel may contain up to .537kg of dinitrogen monoxide gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction. Write your answer in degrees Celsius. Be sure your answer has the correct number of significant digits.
The maximum safe operating temperature for this reaction is equal to 895°C.
Given the following data:
Width of cylinder = 22 cm.Height, h = 26.4 cm.Maximum safe pressure = 6.30mpa.Mass = 0.537 kg.Scientific data:
Ideal gas constant, R = 8.314 L-kPa/Kmol.Molar mass of of dinitrogen monoxide ([tex]N_2F_2[/tex]) gas = 66 g/mol.Radius, r = [tex]\frac{width}{2} =\frac{22}{2} =11\;cm[/tex]
How to calculate the maximum safe operating temperature.First of all, we would determine the volume of the stainless-steel cylinder by using this formula:
[tex]V=\pi r^2 h\\\\V = 3.142 \times 11^2 \times 26.4\\\\[/tex]
Volume, V = 10,036.81 [tex]cm^3[/tex].
In liters, we have:
Volume, V = 10.04 Liters.
Next, we would determine the number of moles of dinitrogen monoxide ([tex]N_2F_2[/tex]) gas:
[tex]Number \;of \;moles = \frac {mass}{molar\;mass}\\\\Number \;of \;moles = \frac {537}{66}[/tex]
Number of moles = 8.136 moles.
Now, we can solve for the maximum safe operating temperature by applying the ideal gas equation:
[tex]PV=nRT\\\\T=\frac{PV}{nR} \\\\T=\frac{6.30 \times 10^3 \times 10.04}{8.136 \times 8.314}\\\\T=\frac{60541.2}{67.6427}[/tex]
T = 895.02 ≈ 895°C.
Read more on temperature here: https://brainly.com/question/24769208
Magnetic field lines appear _____.
A farthest apart at the poles where the magnetic field is strongest
B closest together at the poles where the magnetic field is weakest
C closest together at the poles where the magnetic field is strongest
D farthest apart at the poles where the magnetic field is weakest
Answer:
A
Explanation:
A farthest apart at the poles where the magnetic field is strongest
A person is going for a walk in the evening. To make sure that she can be seen walking when it gets dark, she wears a glow stick around her neck. The glow stick can be used as a light source when she bends the stick. Although the stick is sealed, bending the stick allows two chemicals to come in contact and react with each other. During the chemical reaction, light is given off by the glow stick.
When the reaction stops, light is no longer given off. What happens to the mass of the glow stick after the chemical reaction occurs? Explain citing evidence from the prompt and identify the scientific law that supports your explanation.
(give me claim,evidence,reasoning)
From the law of conservation of mass, the mass of the glow stick does not change after the reaction.
Law of conservation of massFrom the law of conservation of mass we know that mass can neither be created nor destroyed but is converted from one form to another. Since the mass of the system must remain unchanged, It then follows that the mass of the glow stick must remian the same.
Therefore, the mass of the glow stick does not change after the reaction following the law of conservation of mass.
Learn more about conservation of mass: https://brainly.com/question/13383562
In the reaction
Al2S3(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2S(g),
how many moles of HCl are used for each mole of AlCl3 formed?
What are some uses of radioactive dating?
HELPP PLEASEEEE!!!
Answer:
Radioactive dating is a method of dating rocks and minerals using radioactive isotopes. This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. Over 300 naturally-occurring isotopes are known.