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TiliK225 [7]
3 years ago
6

are either positively charged or negatively charged species in which the number of protons and electrons are not equal. ________

____ bonds are chemical bonds that results from the sharing of electrons. ____________ are positively charged ions with more ____________ than ____________ . ____________ ion is an example of a polyatomic anion. ____________ is the system of assigning an unambiguous name to a compound.
Chemistry
1 answer:
fredd [130]3 years ago
6 0

Answer:

1. Ions are either negatively or positively charged species in which the number of electrons and protons are not equal.

2. The chemical bond that arises due to the sharing of electrons is termed a covalent bond.

3. The positively charged ions are called cations, which comprise more protons than electrons.

4. An example of a polyatomic anion is the hydroxide anion.

5. The system of assigning an unambiguous name to a compound is called nomenclature.

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Nuclear decay is a first-order kinetics process. What is the half-life of a radioactive isotope if it takes 233 minutes for the
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<u>Answer:</u> The half life of the given radioactive isotope is 43.86 minutes

<u>Explanation:</u>

Rate law expression for first order kinetics is given by the equation:

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,

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t = time taken for decay process = 233 minutes

[A_o] = initial amount of the reactant = 0.500 M

[A] = amount left after decay process =  0.0125 M

Putting values in above equation, we get:

k=\frac{2.303}{233}\log\frac{0.500}{0.0125}\\\\k=0.0158min^{-1}

The equation used to calculate half life for first order kinetics:

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

where,

t_{1/2} = half-life of the reaction = ?

k = rate constant = 0.0158min^{-1}

Putting values in above equation, we get:

t_{1/2}=\frac{0.693}{0.0158min^{-1}}=43.86min

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8 0
4 years ago
How will the changes listed affect the position of the following equilibrium? 2 NO2(g) 4 NO(g) 1 NO3(g) a. The concentration of
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Answer:

(a) backward direction

(b) forward direction

(c) no change

Explanation:

(a)

On increasing the concentration of NO , the reaction will go in backward direction , as, according to le chatelier's principle ,

In a chemical equilibrium , when the concentration , pressure or temperature is changed , the equilibrium of the reaction is disturbed , hence, in order to gain attain the equilibrium the reaction moves in order to counteract the changes.

So, in this case, the reaction goes back , to reduce the increased concentration of NO.

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(c)

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Hence,

No change , as the system is allowed to expand to 5 times its initial value.

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