a.
P*molar mass = density*RT
Substitute and solve for molar mass.
b.
Use the equation in a to solve for density
c.
XO2 = molar mass = ?
2*atomic mass O = 32
Subtract to find atomic mass X.
A gas has density of 1.977 g/dm3 at STP
(a) what is its molecular mass?
(b) what is its density at 77¢XC and 0.95 atm pressure?
(c)If the gas is an oxide and has the formula XO2, what is the atomic mass of X
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