1. Energy as particles can't move without kinetic (movement) energy
2. I think it's Diffusion and Active Transport
I’m sorry what??...........
Answer:
The fraction of Sr-90 left after 73 years is 0.1726
Explanation:
Initial mass of the isotope =
Time taken by the sample, t =
Formula used :
where,
= initial mass of isotope
N = mass of the parent isotope left after the time, (t)
= half life of the isotope
= rate constant
We have:
t = (2018 - 1945 )years = 73 years
So, on substituting the values:
Now put all the given values in this formula, we get
The fraction of Sr-90 left after 73 years = 0.1726
Answer: 0.24 moles
Explanation: Using IDEAL GAS LAW
PV=nRT
where,
P = pressure of the gas= 2.0 atm
V = volume of the gas= 3.00L
T =Temperature of gas=25^0C=(25+273)K=298K
n = number of moles of gas=?
R = Gas constant = 0.0821 Latm/moleK
n=\frac {PV}{RT}=\frac {2.0\times 3.0}{0.0821\times 298}=0.24moles
The answer is: [C]: Mg<span>₂N₃.
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