Answer:
4 Chlorine atons
Explanation:
4 molecules of NaCl
In NaCl we have only 1 atom of Cl
Therefore in 4 molecules, we have 4 atoms of Cl.
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For this question, we apply the Raoult's Law. The formula is written below:
P = P*x
where
P is the partial pressure
P* is the vapor pressure of the pure solvent
x is the mole fraction
The partial pressure is solved as follows:
P = Total P*x = (250 torr)(0.857) = 214.25 torr
Hence,
214.25 = (361 torr)(x)
<em>x = 0.593 or 59.3%</em>
Answer:
O a 2 in front of hydrochloric acid
Explanation:
the given reaction is :-
=》Zn + 2 HCL -> ZnCl2 + H2
since, mass can't be created or destroy, so number of hydrogen atoms in the reaction should be equal in product as in reaction.
so, there is 2 hydrogen in product hence there are two hydrogen in the reactants also.
it is showed in the reaction by putting a 2 in front of hydrochloric acid ( HCl ).
Answer:
The answer to your question is 68.8%
Explanation:
Data
Iron = 3.8 moles
Sulfur = excess
FeS = 230 g
Molecular weight FeS = 88 g
Process
Reaction
Fe + S ⇒ FeS
1.- Convert the number of moles of Iron to grams
56 g of Iron -------------- 1 mol
x -------------- 3.8 moles
x = (3.8 x 56) / 1
x = 212.8 g of Iron
2.- Calculate the theoretical production of FeS
56 g of Iron ---------------- 88 g of FeS
212.8 g of iron ----------- x
x = (212.8 x 88) / 56
x = 334.4 g of FeS
3.- Calculate the percent yield
% yield = 
% yield = 68.8
It's internal energy or heat energy.
