When wood burns, the mass of the ash is less than the mass of the original wood. Yet the law of conservation of matter says that
1 answer:
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Answer:
Explanation:
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In this case, since the molarity of a solution is calculated by diving the moles of solute by the volume of solution in liters, we first compute the moles of barium hydroxide in 35.5 g as shown below:
Then, the liters of solution:
Finally, the molarity turns out:
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The given question is incomplete. The complete question is:
In the chemical reaction: , with 8 grams of and 16 grams of and the reaction goes to completion, what is the excess reactant and how much of that would remain?
A) 6 grams of
B) 7 grams of
C) 8 grams of
D) 12 grams of
E) 14 grams of
Answer: A) 6 grams of
Explanation:
To calculate the moles :
According to stoichiometry :
1 moles of require 2 moles of
Thus 0.5 moles of will require=
of
Thus is the limiting reagent as it limits the formation of product and
is the excess reagent.
(4.0-1.0) = 3.0 moles of are left unreacted
Mass of remained=
Thus 6.0 g of will remain.