Answer:
(A) first order reaction
Explanation:
A first order reaction is a type of reaction in which the rate of the reaction depends only on the concentration on one of the reactants. Since A is the only reactant we have, it is right to deduce that this reaction is a first order reaction.
Note: while the order of this reaction is 1, its molecularity is 2. The molecularity of a reaction is the number of moles of reactants that is actually reacting.
(B) is wrong
This is because a zero order reaction is one in which the rate of reaction is not influenced by the concentrations of the reactants and hence remains constant irrespective. Since we were not furnished with this idea in the question, it is only right that we reject this answer.
(C) is wrong.
C is outrightly wrong as we have only one reactant.
(D) is wrong
We have only one reactant.
Answer:-
Solution:- The equation for the conversion of gold ions to gold metal is as follows:
From this equation, 1 mol of Gold metal is deposited by 3 mole of electrons.
We know that one mol of electron carries one Faraday that is 96500 Coulombs.
So. 3 moles of electrons would be = 3(96500) = 289500 Coulombs
We could calculate the total Coulombs by using the formula:
q = i*t
where, q is the charge in coulombs, i is the current in ampere and t is time in seconds.
q = 
q = 51408 ampere per second
Since, 1 ampere per second = 1 coulomb
So, 51408 ampere per second is same as 51408 coulombs.
Let's use this value of q and the info from balanced equation and molar mass(196.967 g epr mol) of gold to calculate the mass of it being deposited while the current is passed as:
= 35.0 g Au
So, 35.0 g of gold are deposited on passing 23.8 ampere of current for 36.0 min to a gold solution.
Answer:
A. Oxygen puts off carbon dioxide.
Explanation:
The answer is True. Transportation is used by cars, airplanes, trains, and many other things.
Answer:
letter A.
Explanation:
the rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. this is done by cutting the substance into small pieces, or by grinding it into a powder.if the surface area of a reactant is inceased: more particles are exposed to the other reactant.
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