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4 years ago

Which half reaction correctly describes the reduction that is taking place

Chemistry

1 answer:

pickupchik [31]4 years ago

6 0

<h2>Answer:</h2>

The correct answer is the option A which is: Cl2 + 2e- → 2Cl-

<h3>Explanation:</h3>

<em><u>Reduction is the gain of electrons and resulting in neutral or negative ions.</u></em>

<em><u>It is also the gain of hydrogen and release of oxygen ions.</u></em>

According to first most definition, option A describes the reduction.
Option B is incomplete reaction.
While C and D are oxidation reactions.

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Answer:

N2 + H20

Explanation:

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3 years ago

Distinguish(solid,liquid,gas)

amm1812

Answer:

Explanation:

A solid, at a given temperature, has a definite volume

and shape which may be affected by changes in

temperature. Solids usually increase slightly in size

when heated (expansion) and usually

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A gas, at a given temperature, has neither a definite

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3 years ago

____ 46. the number of electrons present in the s orbitals in the outermost electron shell of the alkaline earth (group iia) met

myrzilka [38]

All of the group iia metals (the column with Be, Mg, Ca, etc) have an outermost s suborbital with 2 electrons

8 0

3 years ago

The half-life of gold-198 is 2.7 days. After

Pie

Answer: 8.1 days

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant = x

a - x = amount left after decay process= $\frac{x}{4}$

a) to find rate constant

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{\frac{1}{2}}=\frac{0.693}{k}$

$k=\frac{0.693}{2.7days}=0.257days^{-1}$

b) for completion of one fourth of reaction

$t=\frac{2.303}{k}\log\frac{x}{\frac{x}{4}}$

$t=\frac{2.303}{0.257}\log{4}$

$t=8.1days$

Thus after 8.1 days , one fourth of original amount will remain.

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4 years ago

What is the molarity of 2.00 L of a solution that contains 14.6 g NaCl?

White raven [17]

Answer: The molarity of the solution is 0.125 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in L

moles of $NaCl$ = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{14.6g}{58.5g/mol}=0.250mol$

Now put all the given values in the formula of molality, we get

$Molarity=\frac{0.250mol}{2.00L}=0.125M$

Therefore, the molarity of the solution is 0.125 M

8 0

3 years ago