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Anna35 [415]
3 years ago
11

Fill in the blank: You can find the number of __________ in any atom by subtracting the atomic number from the mass number.

Chemistry
1 answer:
Shtirlitz [24]3 years ago
5 0
B is true if we subtract atomic number(the number of protons )from the mass number
we can find neutrons.
hope this helps
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Answer:

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PT = PA + PB

This relationship is due to the assumption that there are no attractive forces between the gases.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. The mole fraction is a dimensionless quantity that expresses the ratio of the number of moles of a component to the number of moles of all the components present.

So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

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In this case:

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Replacing:

300 torr= XN₂*1140 torr

Solving:

X_{N_{2} } =\frac{300 torr}{1140 torr}

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