<h3>Answer:</h3>
36.70 amu
<h3>Solution:</h3>
Data Given:
Atomic Mass of ³⁵Cl = 34.9700 amu
Natural Abundance of ³⁵Cl = 13.85 %
Atomic Mass of ³⁷Cl = 36.9700 amu
Natural Abundance of ³⁷Cl = 86.15 %
Formula Used:
Average Atomic Mass = [(Atomic Mass of ³⁵Cl × Natural Abundance of ³⁵Cl) + (Atomic Mass of ³⁷Cl × Natural Abundance of ³⁷Cl)] ÷ 100
Putting values,
Average Atomic Mass = [(34.9700 × 13.85) + (36.9700 × 86.15)] ÷ 100
Average Atomic Mass = [(484.3345) + (3184.9655)] ÷ 100
Average Atomic Mass = 3669.3 ÷ 100
Average Atomic Mass = 36.70 amu
I think using metal alloys would be better than using the pure metal would cut down on the amount of gases that are released in the air.
Answer : The partial pressure of 
is, 222.93 torr
Explanation :
Half-life = 2.81 hr = 168.6 min
First we have to calculate the rate constant, we use the formula :
Now we have to calculate the partial pressure of
The balanced chemical reaction is:
Initial pressure 760 0 0
At eqm. (760-2x) 4x x
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = time passed by the sample = 215 min
a = initial pressure of 
= 760 torr
a - x = pressure of at equilibrium = (760-2x) torr
Now put all the given values in above equation, we get:
The partial pressure of = x = 222.93 torr
5.75mol (22.4L/1mol) = 128.8L
