Solve this stoichiometry problem 2 2 unread replies. 2 2 replies. solve the following problem showing all of your work and including all units. you can solve the problem in several steps or as a tandem conversion problem. how many grams of br2 are needed to completely convert 15.0 g al to albr3 ? al (s) + br2 (l) --> albr3 (hint: the equation is not balanced)
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Ответ:
Answer : For, this question,
The balanced equation is; 2Al + 3 ----> 2Al
We can now, calculate how many grams of will be needed to completely convert 15 g of Al into Al.
Here, the reaction produces, 2 moles of Al
So, For 15.0 g of Al; we can calculate;
(15.0 g Al) X (1 mole Al / 26.98 g Al) X (3 moles / 2 moles Al) X (159.81 g / 1 mole )
= 133 g of will be needed.
Therefore, 133g of will be needed to completely convert 15 g of Al into Al.
Ответ:
Answer : The mass of needed are, 131.8 grams
Solution : Given,
Mass of Al = 15 g
Molar mass of Al = 27 g/mole
Molar mass of = 159.8 g/mole
First we have to calculate the moles of Al.
Now we have to calculate the moles of
The given balanced reaction will be,
From the balanced reaction, we conclude that
As, 2 moles of Al react with 3 moles of
So, 0.55 mole of Al react with of
Now we have to calculate the mass of
Therefore, the mass of needed are, 131.8 grams
Ответ:
Explanation:
A prussian blue colouration indicates the presence of nitrogen in the compound.
If nitrogen is present in the compound, the sodium extract would contain sodium cyanide formed during fusion.
On adding the required reagents, sodium cyanide reacts to form ferric-ferrocyanide which has prussian blue colour.
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