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3 years ago

How does a hydroelectric power plant convert energy?

Chemistry

2 answers:

Eddi Din [679]3 years ago

6 0

The answer is c I know because I did did yesterday

ad-work [718]3 years ago

6 0

Answer:

lol

Explanation:

ur mom 200203394949494949595959595

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Find the pOH of a solution made by dissolving 10.4g of HCl in a 500mL solution of water

shutvik [7]

The pOH of a solution : 13.756

<h3>Further explanation</h3>

Mass HCl=10.4 g

mol HCl (MW=36.5 g/mol) :

$\tt mol=\dfrac{mass}{MW}=\dfrac{10.4}{36.5}=0.285$

Volume of HCl = 500 ml = 0.5 L

$\tt M=\dfrac{n}{V}\\\\M=\dfrac{0.285}{0.5}=0.57~M$

HCl ⇒ H⁺ + Cl⁻

[H⁺]=[HCl]=0.57 M

pH= - log[H⁺]

pH=-log[0.57]=0.244

pH+pOH=14

pOH=14-0.244

pOH=13.756

6 0

3 years ago

PLEASE ANSWER!!!!!!!! WILL MARK BRAILIEST

Mariana [72]

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3 years ago

What kind of heat is it when you cook an egg in a frying pan?

USPshnik [31]

I may be totally wrong but I’ll make a guess to it being thermodynamics.

5 0

3 years ago

Need help !!!!! ASAP

Korolek [52]

<h2>Hello!</h2>

The answer is:

The new volume is 2.84 L.

$V_{2}=2.84L$

To solve the problem, we need to remember what STP means. STP means that the gas is at standard temperature and pressure, or 273.15 K (0°C) and 1 atm.

Also, we need to use the Combined Gas Law, since the temperature, the pressure and the volume are being changed.

The Combined Gas Law establishes a relationship between the temperature, the pressure and the volume of an ideal gas using , Gay-Lussac's Law, Charles's Law, and Boyle's Law.

The law is defined by the following equation:

$\frac{P_{1}V{1}}{T_{1}}=\frac{P_{2}V{2}}{T_{2}}$

Where,

$P_{1}$ is the first pressure.

$V_{1}$ is the first volume.

$T_{1}$ is the first temperature.

$P_{2}$ is the second pressure.

$V_{2}$ is the second volume.

$T_{2}$ is the second temperature.

So, we are given the following information:

$V_{1}=2L\\P_{1}=1atm\\T_{1}=0\°C=273.15K\\P_{2}=80kPa=0.8atm\\T_{2}=37\°C=37+273=310K$

Then, isolating the new volume, and substituting, we have:

$\frac{P_{1}V{1}}{T_{1}}=\frac{P_{2}V{2}}{T_{2}}\\\\V_{2}=\frac{P_{1}V{1}}{T_{1}}*\frac{T_{2}}{P_{2}}\\\\V_{2}=\frac{1atm*2L}{273.15K}*\frac{310K}{0.8kPa}=2.84L$

Hence, the new volume is 2.84 L.

$V_{2}=2.84L$

Have a nice day!

4 0

4 years ago

Which one is the answer

ss7ja [257]

Answer: The Answer is A

Only one side of the Moon is visible from Earth because the Moon rotates on its axis at the same rate that the Moon orbits the Earth – a situation known as synchronous rotation, or tidal locking. The Moon is directly illuminated by the Sun, and the cyclically varying viewing conditions cause the lunar phases.

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3 years ago