Answer to Question #158522 in General Chemistry for Sage Topaz

Question

What is the density of Carbon Dioxide gas at

a. Standard temperature and pressure?

 b. 20 degree Celsius and 735 mm Hg?

Note: density = mass/Volume       n = mass/molar mass  

Answer 1

a. Mass of co_{2 is equal to the mass of 1 molecule of carbon+mass of 2 molecules of oxygen}

_{Mass=12=(2x16)=44.}

_{N is the mass of 1 molecule which is equal to 44.}

_{Density=mass/volume}

_{Find volume of c02 is equal to v=nRT/P}

_{R=8.314772(molar gas constant)}

_{N=1, T=273k, p=1 or 101325pa}

_{v=(1x8.314772X273)/101325=0.02240249}

_{d=m/v(mass in kg)}

_{d=0.044/0.02240249=1.9784}

_{Density of 1 mole of carbon dioxide at standard temperature and pressure is 1.9784}

b. V={8.314772x(20+273)}/(735x133.322)

2436.2282/97991.67

v=0.0248618

d=m/v

=0.044/0.0248618

density=1.7698.