Factor that can be controlled changed or measured in an experiment.
I just got off my car now I’m headed home the house right here and I’m headed home the office right here and I’m going to go to get a car I don’t know if it’s going or I have a lot of stuff that you are going there to do that and you have a good time at your house I don’t have any money to do it I’m not really sure what I do I need to get a car and I just don’t want it to happen I just don’t got to go back and forth with my bad buddy I’m going there and I just wanted you guys know ur so I could do that and and you know I I didn’t do it correctly.
Answer:
original activity is 3600 cpm
Explanation:
3 half-lives = 450 cpm
2 half-lives = 900 cpm
1 half-life = 1800 cpm
answer = 3600 cpm
Answer : The moles of oxygen gas lost are 2.88 mole
Explanation :
According to the Avogadro's Law, the volume is directly proportional to the number of moles of the gas at constant pressure and temperature.
(At constant temperature and pressure)
or,
where,
= initial volume of oxygen gas = 12.6 L
= final volume of oxygen gas = 12.1 L
= initial moles of oxygen gas = 3.0 mole
= final moles of oxygen gas = ?
Now put all the given values in the above formula, we get the final moles of oxygen gas.
Therefore, the moles of oxygen gas lost are 2.88 mole