Chemistry Help..? Need urgent!

Posted on 2017-03-28 18:57:00 in Chemistry by FLORA

if the percentage composition and the total pressure is known the partial pressure can be calculated.A container holds oxygen at a partial pressure of 0.25atm nitrogen at a partial pressure of 0.50atm and helium at a partial pressure of .20 atm. What is the total pressure inside the container? Any help will be appreciate. 
Would I solve by adding all the partial pressures 
PTotal=0.25atm +0.50atm+0.20atm 
Pt=.95atm

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