An air mattress is filled with 16.5 moles of air. the air inside the mattress has a temperature of 295 k and a gauge pressure of 3.5 kilopascals. what is the volume of the air mattress? the volume of the air mattress is liters.

 The volume  of  air  mattress is  = 1.127 L

    calculation

The   volume  of air is calculated  using the ideal gas equation

that is Pv=nRT  where,

     P(pressure)= 3.5 kilopascals  convert  into Atm

                      1 atm   =0.00987 KPa

                        ?atm  =  3.5 Kpa

=  (3.5 kpa  x 1 atm)  / 0.00987 kpa =354.6  atm

V(volume) = ?

n( no  of moles) = 16.5  moles

R (gas constant)=   0.0821 L.atm/mol.K

T(Temperature) =  295 K

make V  the subject of the formula   V=nRT/P

V= ( 16.5 moles x 0.0821  atm/mol.K  x 295 k)  /354.6 atm =1.127 L

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.