Asked Dec 3, 2019

At STP, 0.284 L of a gas weighs 0.401 g. Calculate the molar mass of the gas.


Expert Answer

Step 1

Ideal gas equation is,


Image Transcriptionclose

PV nRT where P-Pressure T-Temperature R-Gasconstant V-Volume n-Number of moles

Step 2

Given :

Volume of gas = 0.284

Mass of gas = 0.401 g

Temperature = 273 K

Pressure = 1 atm

R = 0.082.



Image Transcriptionclose

PV n= RT 1x0.284L =0.0127mol 0.0821x273 K Mass Molar mass= mole 0.401g -31.57 g/mol 0.0127mol -32.0 g/mol


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Gas laws

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: O MEASUREMENT Deducing the unit missing from the solution to a basic qu.. A studen...

A: The given equation is


Q: when 12.259g of a compound containning only copper and oxygen is descomposed it produced 2.410 of ox...

A: According to law of conservation of mass, total mass of reactants and products in a chemical reactio...


Q: Balance the following redox reaction under acidic aqueous conditions using the smallest whole-number...

A: The redox reaction under acidic aqueous conditions using the smallest whole-number coefficients poss...


Q: Find the volume of 0.110 M hydrochloric acid necessary to react completely with 1.74 g Al(OH)3

A: Given,Mass of Al(OH)3 = 1.74 gMolarity of HCl = 0.110 M = 0.11 mol/LMoles of Al(OH)3  can be calcula...


Q: A gas occupies a volume of 0.75 L at 20 ∘C at 720 torr. What volume would the gas occupy at 41 ∘C an...

A: The volume of gas is determined by using following expression,


Q: When the number of molecules in a container decreases in a chemical reaction the reactants probabili...

A: a. P4(g) +5O2(g) ←→ P4O10(s)In the above reaction, there are six moles in gas phase on the right-han...


Q: What is the numerical value of Ksp for silver oxalate, Ag2C2O4, if a saturated solution contains 2.2...

A: The Ksp which is also known as the solubility product constant is used to show the equilibrium which...


Q: Suppose that in a phase diagram, when the sample was prepared with the mole fraction of component A ...

A: The lever rule can be defined as a rule which is used for the determination of the mole fraction of ...


Q: 8. Rate constant of some 1st order reaction is 4.0 x 103 s1 at 40 60C. Calculate the Arrenius parame...

A: Given:Temperature T1 = 40 oC = 313 K.Temperature T2 = 60 oC = 333 K.Rate Constant at T1 (K1) = 4.0×1...