Qualification > Math
Maths/Physics help
astarmathsandphysics:
The diazstance is also doubled
astarmathsandphysics:
The disatnce is aLSO DOUBLED
omarsubei:
OK ok ok. Thanks a lot
omarsubei:
I just can't get this question:
A container is filled with a mixture of nitrogen and oxygen. What is the ratio of the rms (root mean squared) speed of oxygen molecules to that of nitrogen molecules? (Molar mass of oxygen=32 g mol-1 ; molar mass of nitrogen=28 g mol-1
I'll tell you the answer this time :P : 0.935
astarmathsandphysics:
--- Quote from: omarsubei on February 13, 2009, 11:25:19 am ---I just can't get this question:
A container is filled with a mixture of nitrogen and oxygen. What is the ratio of the rms (root mean squared) speed of oxygen molecules to that of nitrogen molecules? (Molar mass of oxygen=32 g mol-1 ; molar mass of nitrogen=28 g mol-1
I'll tell you the answer this time :P : 0.935
--- End quote ---
All the molecules have the same kinetic energy
therefore0.5m(ox)v(ox)^2=0.5M(nit)v(nit)^2
therefore rms(ox)/rms(nit)=sqrt(m(nit)/(ox))=sqrt(14/16)=0.93
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