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firstly, dont get angry
please explain theleagueofshadows
Structural Formula is the one shown, it is written in my book as well that structural formula can be displayed by both drawing and writing, but the latter is not common now, it was used in the old days. It is the condensed formula. Now, we use diagram representations of these. You can check from online sources if you want.
Well, I still believe CIE is mad. In their OWN questions they show structural formulas having OH not O-H and its in their books as well. Now, they expect students, in all that tension, to figure out these small details, I hate them!
k here is the explaination.
mole of Ca = 40/40 = 1 mol
I am posting my notes regarding formula of butane. You will see what I mean.firstly, dont get angry
you said, "The displayed and the structural formula of an organic compound is same"...may i ask what is the structural, displayed and molecular formula of butane..
and u said, "However, their structure is different as they are arranged differently in their displayed formulaes."....what ?
Displayed formulas are a type of structural formula. So are condensed formulas.
k here is the explaination.
40g of Ca = 1 mole. So it would react with two moles of water that is 36g. The rest of the water 100-36 = 64g is still left in the solution
now on the product side, 1 mole of Ca(OH)2 is formed. We can ignore the H2 as it is lost as gas. So mass of Ca(OH)2 is 74g
So, 64 + 74 = 138g
the mole of Ca is 1 but that of water is 5.6..so Ca is limiting agent (or water in excess)
the mole of Ca is 1 but that of water is 5.6..so Ca is limiting agent (or water in excess)
and for mole ratio, always take the limiting agents mole
I don't know why use guys use 'limiting agent', it feels so odd (I know it's correct) since I've read 'in excess' from the beginning.the mole of Ca is 1 but that of water is 5.6..so Ca is limiting agent (or water in excess)
and for mole ratio, always take the limiting agents mole
It's the reactant that completely reacts (or it's the reactant that is NOT in excess).
galvanizing is to coat the whole Iron surface with Zinc so that the iron does not come in contact with water and air
same here i was like WHAT as i did not know what limiting factor meantI don't know why use guys use 'limiting agent', it feels so odd (I know it's correct) since I've read 'in excess' from the beginning.
i also wrote water in excess in brackets...cant help, learnt it from beginningI don't know why use guys use 'limiting agent', it feels so odd (I know it's correct) since I've read 'in excess' from the beginning.
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