A 22.8-gram sample of gas is found to have a volume of 1.5 liters at 287 K and 0.98
atm. What is the molar mass of this gas? Show all of the work used to solve this
problem.

365.4 g/mol is the molar mass of this gas.

Explanation:

Using ideal gas equation:

PV = nRT

where,

P = Pressure of gas = 0.98 atm

V = Volume of gas = 1.5 L

n = number of moles of gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of gas = 287  K

Putting values in above equation, we get:

Moles of gas = n = 0.06239 mol

Mass of gas = m = 22.8 g

Molar mass of gas = M

365.4 g/mol is the molar mass of this gas.

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on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

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