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4vir4ik [10]
3 years ago
8

What is used to find true north on a compass? a. equator c. magnetic declination b. prime meridian d. cardinal directions Please

select the best answer from the choices provided A B C D
Chemistry
2 answers:
Flauer [41]3 years ago
6 0

Answer:

The correct answer is Magnetic Declination

Explanation:

This is the angle on the horizontal plane that is in the middle of north and geographic north. A compass point in the direction of the magnetic north inteasd of the true north. If the truth north is wanted to be read, then a change is gonna happen adding the magnetic declination to reading to get to the true north.  

uysha [10]3 years ago
4 0

the answer is C magnetic declination


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Suppose a gas mixture used for anesthesia contains 4.60 mol oxygen (O₂) and 6.00 mol nitrous oxide (N₂O). The total pressure of
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Considering the definition of mole fraction, the mole fraction of O₂ in the mixture is 0.434.

<h3>Definition of mole fraction</h3>

The molar fraction is a way of measuring the concentration that expresses the proportion in which a substance is found with respect to the total moles of the solution.

In other words, the mole fraction expresses the concentration of solute in a solution as the ratio of moles of substance to total moles of solution:

mole fraction=\frac{moles of substance}{moles of solution}

<h3>Mole fraction of O₂ in this mixture</h3>

In this case, you know a gas mixture used for anesthesia contains 4.60 mol oxygen (O₂) and 6.00 mol nitrous oxide (N₂O).

So, the total moles of the solution can be calculated as:

Total moles = moles of oxygen (O₂) + moles of nitrous oxide (N₂O)

Then:

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Finally, the more fraction of O₂ can be calculated as follow:

Mole fraction of O_{2} =\frac{moles of O_{2}}{total moles}

Mole fraction of O_{2} =\frac{4.60 moles}{10.6o moles}

Solving:

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Finally, the mole fraction of O₂ in the mixture is 0.434.

Learn more about mole fraction:

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