3 years ago

Need to finish this quiz in the next 15 minutes. Giving away many points

Chemistry

1 answer:

babunello [35]3 years ago

3 0

Answer:

got it off the internet...plus that's what my science teacher said in class

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1.what happens in the nucleus of an atom when an alpha particle is emitted?

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2) The nucleus of an atom gains a proton and it's neutrons remain the same.

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Changes that occur during a chemical reaction are represented by a(n) _?_.

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How many nitrogen atoms are present in calcium nitrate, Ca(NO3)2?

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A sample of nitrogen gas, stored in a 2.96-L container at 32.0°C, exerts a pressure of 4.27 atm. Calculate the number of moles o

inysia [295]

<u>Answer:</u> The number of moles of nitrogen gas is 0.505 moles.

<u>Explanation:</u>

To calculate the number of moles of nitrogen gas, we use ideal gas equation, which is:

$PV=nRT$

where,

P = pressure of the gas = 4.27 atm

V = Volume of the gas = 2.96 L

T = Temperature of the gas = $32.0^oC=[32.0+273]K=305K$

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

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Putting values in above equation, we get:

$4.27atm\times 2.96L=n\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 305K\\n=0.505mol$

Hence, the number of moles of nitrogen gas is 0.505 moles.

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