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murzikaleks [220]
2 years ago
6

The total pressure of gas collected over water is 725.0 mmHg and the temperature is 18.5 C what is the pressure of hydrogen gas

formed in mmHg
Chemistry
1 answer:
ValentinkaMS [17]2 years ago
6 0

Hydrogen was is collected over water with a total pressure of 725.0 mmHg at 18.5 °C. The partial pressure of hydrogen gas is 708.9 mmHg.

<h3>What is collecting gas over water?</h3>

When a gas is produced in a chemical reaction, it can be collected by water displacement.

Because the gas is collected over water, it is not pure but is mixed with vapor from the evaporation of the water.

<h3>What does Dalton's law state?</h3>

Dalton's law state that the total pressure of a gaseous mixture is equal to the sum of the partial pressures of the gases.

The total pressure of gas collected over water is 725.0 mmHg and the temperature is 18.5 °C.

At that temperature, the vapor pressure of water is 16.13 mmHg.

P = pGas + pH₂O

pGas = P - pH₂O = 725.0 mmHg - 16.13 mmHg = 708.9 mmHg

Hydrogen was is collected over water with a total pressure of 725.0 mmHg at 18.5 °C. The partial pressure of hydrogen gas is 708.9 mmHg.

Learn more about collecting gases over water here: brainly.com/question/13323291

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Tarnish on copper is the compound CuO. A tarnished copper plate is placed in an aluminum pan of boiling water. When enough salt
oksian1 [2.3K]

Answer:

The standard cell potential is 2.00 V

Explanation:

<u>Step 1:</u> Data given

Cu is cathode because of higher EP

Al3++3e−→Al       E∘=−1.66 V     anode

Cu2++2e−→Cu    E∘=0.340 V    cathode

<u>Step 2:</u> Balance both equations

2*(Al → Al3+-3e−)       E∘=1.66 V    

3*(Cu2++2e−→Cu)    E∘=0.340 V

<u>Step 3:</u> The netto equation

2 Al + 3Cu2+ +6e- → 2Al3+ + 3Cu -6e-

2 Al + 3Cu2+  → 2Al3+ + 3Cu

<u>Step 4:</u> Calculate the standard cell potential

E∘cell = E∘cathode - E∘anode

E∘cell = E∘ Cu2+/Cu - E∘ Al3+/Al

E∘cell =0.340 V - (-1.66) = 2.00 V

The standard cell potential is 2.00 V

4 0
2 years ago
A small hole in the wing of a space shuttle requires a 15.9 cm2 patch.
Rzqust [24]

The patch area in square kilometers is 1.59*10⁻⁹ km₂

Why?

This is an unit conversion problem. We have to convert from cm² to km². We can do that by knowing that there are 100 cm in 1 m, and 1000 m in 1 km, so 100000 cm=1km. Knowing that we can apply the following conversion factor:

15.9 cm^{2} * (\frac{1 km}{100000 cm} )^{2}=0.00000000159 km^{2}

Now to convert this value to scientific notation, we have to move the decimal point to the right until we get a whole number, and the exponent of the number 10 is going to be the number of spaces we moved to the right (negative), so the final answer is:

0.00000000159 km^{2}=1.59*10^{-9} km^{2}

Have a nice day!

#LearnwithBrainly

8 0
3 years ago
Arrange the liquids pentane (CH3CH2CH2CH2CH3), pentanol (CH3CH2CH2CH2CH2OH), and pentanal (CH3CH2CH2CH2CHO) in order of decreasi
lbvjy [14]

Answer:

Explanation:

These properties are governed by intermolecular forces. The most important part here is the oxygen interaction with the surroundings. For temperature the decreasing order is pentanol, pentanal and pentane. For viscocity: pentanol, pentanal and pentane. For surface tension: pentanol, pentanal and pentane.

This order, as said before, is due to the interaction of oxygen with the surroundings, within the intermolecular forces we can find van der waals forces and hydrogen bonds, it is also know that H-bonds are stronger than van der waals forces so then that is why we have this type of interactions.

5 0
3 years ago
Read 2 more answers
The following two structures would be considered isomers.<br> Select one:<br> O True<br> O False
Nat2105 [25]

Answer:

False

Explanation:

Isomerism is a phenomenon where by two or more compounds have the same molecular formula but different structural patterns. The compounds involved are called isomers.

Now, let us consider the molecular formula of the two compounds given in the question above.

The two compounds given in the question above have different molecular formula

Benzene has molecular formula as C6H6

Cyclohexane has molecular formula as C6H12.

Since their molecular formula are different, therefore, they are not isomers..

3 0
3 years ago
Explain why are hydrogen and oxygen considered as wheares water as a compound?
Elina [12.6K]
Hydrogen and oxygen are different elements.

when two or more elements combine, they form a compound

hence, two molecules of hydrogen and one molecule of oxygen combine to form water as a compound
3 0
3 years ago
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