Question

pleaseee help
pleaseee really really important
3 of the questions

Answer 1

Hey mate !!

Here's the answer !!

So given that,

Mass of bottle = 30 g

Mass of Ethanol with bottle's mass = 78 g

So Mass of only Ethanol = 78 g - 30 g = 48 g

We know that Molar Mass of Ethanol :

Ethanol = C₂H₅OH

= 2 ( 12 ) + 5 ( 1 ) + ( 16 )  + ( 1 )

= 24 + 5 + 16 + 1 

= 25 + 21

= 46 g

So Number of Moles = Given Mass / Molar Mass

=> Number of Moles = 48 g / 46 g = 1.04 Moles.

We know that,

Number of moles = Given Volume / 22.4 liters

=> 1.04 * 22.4 = Given Volume

=> 23.296 liters.

So the given volume of Ethanol is 23.296 Liters.

Now we know that Density = Mass / Volume

=> Density = 48 / 23.296 = 2.06 g / Liter

Therefore to conclude,

Mass = 48 g

Volume = 23.296 L

Density = 2.06 g / L

Hope my answer helps !!

Cheers !!

Answer 2

Answer:

Thank you for free points