This attempt took 12minutes 0 143 pts Incorrect uestion 1 An oxygen gas tank hol

Question

This attempt took 12minutes 0 143 pts Incorrect uestion 1 An oxygen gas tank holds 1 mole of gas at 10. atm pressure. In order to reduce the pressure of the tank to 2.5 atm particles must be released. How many particles willbe left? 3.0 x 1023 6.0 x 1023 1.5 x 1023 2.5 x 1023 0/14.3 pts lacomed Question 2 Avogadro's Law can be applied to one of the following situations. Which one? A hot air balloon rises when the air is heated A small balloon deflating as air is let out A sealed bag containing gas expanding at high altitude A metal can explodes if heated to hlgh temperature

Explanation / Answer

1)

ni = 1 mol

Pi = 10 atm

Pf = 2.5 atm

Calculate final number of moles using,

Pi/ni = Pf/nf

10 / 1 = 2.5/nf

nf = 0.25 mol

SO,

number of O2 particle = number of mol * 6.022*10^23

= 0.25*6.022*10^23

= 1.5*10^23

Answer: 1.5*10^23

2)

Avogadro’s law gives relation between volume and number of particle

This can be used when volume and number of particle both are changing which is happening for option 2

Answer: A small balloon deflating as air is let out

I am allowed to answer only 1 question at a time

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