 # Chemistry Homework Help

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fvzcylnznmva

Science

### Question Description

Q1:

How many moles of a gas are in a balloon that has a volume of 15.9L at a pressure of 149kPa and a temperature of 28C?

Q2:

A sample of carbon dioxide(CO2) has a mass of 55g and occupies 3.3L at 100C. What pressure does the gas exert (in kPa)? Student has agreed that all tutoring, explanations, and answers provided by the tutor will be used to help in the learning process and in accordance with Studypool's honor code & terms of service. In both questions we are going to use the ideal gas law PV=nRT

Q1 : So we have n=(PV)/(RT)

P=149 kPa, V=15.9 L, R=8.314 kPa•L/mol•K and T=273+28=301 K

So n=(149*15.9)/(8.314*301)=0.95 moles

Q2 : We have P=(nRT)/V or n=m/M so P=(mRT)/(M*V)

T=273+100= 373 K and M(CO2)=44 g/mol

P=(55*8.314*373)/(3.3*44)=1,175 kPa zngurzntvpvra (180)
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