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what is the answer to this?
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what is the answer to this?
Bwhat is the answer to this?
First find out the volume of M using the initial conditions that have been provided using the formula PV=nRTView attachment 51482
can someone please help me with question 4?i know the equation is PV=nRT i just have problem finding the volume and the number of moles
the answer is A btw
but are we just assuming that n=1?First find out the volume of M using the initial conditions that have been provided using the formula PV=nRT
Where P= 1*10^5, V=?, T= ( 20+273 ) & n =1
so this way find out the volume ..... and u will get it as 0.024 m^3( i prefer u to the carry the entire answer in the calculator )
and then consider the entire system to find the new pressure which is found by using the same formula .. but this time u know the volume of N which is 3 times the volume of M therefore
New volume of the system = ( 4* 0.024 ) , New temp = ( 100 +273 ) & n = 1...
so this way u will get the new pressure as 3.18*10^4 Pa.. ie A
Hope you got it
yesbut are we just assuming that n=1?
oh okay, thankyou! could you help me with this too, if possible please?
Your welcomeoh okay, thankyou! could you help me with this too, if possible please?
6 Use of the Data Booklet is relevant to this question. In some countries, anhydrous calcium chloride is used as a drying agent to reduce dampness in houses. The anhydrous salt absorbs enough water to form the dihydrate CaCl 2.2H2O. What is the percentage increase in mass?
A 14%
B 24%
C 32%
D 36%
answer is C
Oh thanks a lotIn this case, we divide equally because the question gives us the information that "a single product was obtained after oxidizing."
We don't assume that we divide equally for all other questions unless the clues tells us so.
As for your example of 5 carbons, there is no way to obtain a single product after oxidizing.
The arrow is pointed towards water and from the cycle you can see there is 2 moles of water present. So 2 * delta H of H2O
The Answer is D ...
Can someone please explain me why the answer is D and not C ?? please help ///
Thankyou so much! I realised what my mistake was, silly as alwaysYour welcome
Well this is and easy question and it goes like this ...
First find the Mr of both the compounds .. i mean for CaCl2 ( 111.1g ) and for Cacl2.2H2O ( 147.1g ) .... and then find the increase in percentage using either using the cross multiplication method ( the method which i prefer all the time ) or any other way ....
(147.1*100)/111.1 = 132.4
therefore 132.4-100 = to get the increase in percentage from the standard 100%
which is 32 % .. ie C
Hope you got it ...
You most welcome ah dw .. its just okay and now try to focusThankyou so much! I realised what my mistake was, silly as always
But may i know why is it +2???The arrow is pointed towards water and from the cycle you can see there is 2 moles of water present. So 2 * delta H of H2O
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