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Q15 how u find total mass?
how to solve this?View attachment 57378
View attachment 57381
The 12th question please ... any easy and short method would be highly appreciated
oh thank you so much ... i had balanced my equation wrong.2X(NO3)2 --> 2XO + 4NO2 + O2
let x be the Mr of element X
moles of X(NO3)2 = 3/(x+124)
mass of XO = 3 - 1.53 = 1.47 g
moles of XO = 1.47/ (x + 16)
Based on the balanced equation, moles of X(NO3)2 =moles of XO
Therefore, 3/(x+124) = 1.47/ (x + 16)
Solve for x.
Is the mass of total products always equal to the mass of reactants used?2X(NO3)2 --> 2XO + 4NO2 + O2
let x be the Mr of element X
moles of X(NO3)2 = 3/(x+124)
mass of XO = 3 - 1.53 = 1.47 g
moles of XO = 1.47/ (x + 16)
Based on the balanced equation, moles of X(NO3)2 =moles of XO
Therefore, 3/(x+124) = 1.47/ (x + 16)
Solve for x.
Is the mass of total products always equal to the mass of reactants used?
1000 + 200Q15 how u find total mass?
Enthalpy change of hydration is always exothermic, not sure, but till now I have not come up with a question of it with Endothermic. If u know some reaction that is endothermic do lemme know!! Thanks.Water is added to anhydrous aluminium chloride to make a 0.1 mol dm-3 solution.
Which observations are correct?
1 The reaction is endothermic.
Why this statement is incorrect?
Why this is enthalpy change of hydration instead of enthalpy change of solution? Thank you !Enthalpy change of hydration is always exothermic, not sure, but till now I have not come up with a question of it with Endothermic. If u know some reaction that is endothermic do lemme know!! Thanks.
Both are different.Why this is enthalpy change of hydration instead of enthalpy change of solution? Thank you !
enthalpy of change hydration is the enthalpy change when "gaseous atoms" dissolve in water while enthalpy of solution is when "ionic compound' dissolves in water.. u can check whats going in your question and relate.Why this is enthalpy change of hydration instead of enthalpy change of solution? Thank you !
Here its the SEC of hydration of anhydrous salt.Why this is enthalpy change of hydration instead of enthalpy change of solution? Thank you !
I was not aware of this thing till this paper came. That was a guess of mine and hopefully it was correct.View attachment 57387
can someone plz explain the 37th one?
there is no free rotation around carbon to carbon double bond and therefore structures with c to c double bonds lie in the same plane...the third one does not have carbon to carbon double bond in the labelled carbons, the double bond shown is with OView attachment 57387
can someone plz explain the 37th one?
P^2(HI) = (28)^2hey!!
can someone please explain this:
When a sample of HI is warmed to a particular temperature the equilibrium below is established.
2HI(g) H2(g) + I2(g)
At this temperature, it is found that the partial pressure of HI(g) is 28 times the partial pressure of H2(g). What is the value of Kp at this temperature?
A 1.28 × 10–3
B 0.035
C 28
D 784
The answer is A.
Thank you!!
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