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3 years ago

Why does every chemical reaction require a certain amount of activation energy?

Chemistry

2 answers:

DENIUS [597]3 years ago

5 0

Answer: C. Forming the activated complex requires energy.

Explanation:

Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.

In order that reactants change into products, they have to cross an energy barrier. When reactant molecules absorb energy, their bonds are loosened and new loose bonds are formed between them.

The intermediate thus formed is called as activation complex. It is unstable and immediately dissociates to form stable products by release of energy.

Savatey [412]3 years ago

4 0

The answer could possibly be D.) The product have more potential than the activated complex OR C.) Forming the activated complex requires energy .

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Why gold is called inert metal

astraxan [27]

Gold has a heavy enough nucleus that its electrons must travel at speeds nearing the speed of light to prevent them from falling into the nucleus. This relativistic effect applies to those orbitals that have appreciable density at the nucleus, such as s and p orbitals. These relativistic electrons gain mass and as a consequence, their orbits contract. As these s and (to some degree) p orbits are contracted, the other electrons in d and f orbitals are better screened from the nucleus and their orbitals actually expand.

Since the 6s orbital with one electron is contracted, this electron is more tightly bound to the nucleus and less available for bonding with other atoms. The 4f and 5d orbitals expand, but can't be involved in bond formation since they are completely filled. This is why gold is relatively unreactive.

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3 years ago

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Answer:

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Zolol [24]

Answer:

selective breeding

Explanation:

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3 years ago

Which of the following elements is the least electronegative?

Pepsi [2]

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3 years ago

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How many grams of O2 gas are in a 3700 mL container at a pressure of 775 mmHg at 33oC?

Zina [86]

Answer:

4.8 grams

Explanation:

Use PV=nRT

P: 775 mmHg (divide by 760 mmHg to get atm) -> 1.02 atm

V: 3700 mL (divide by 1000 to get L) -> 3.7L

n: ?

R: (a constant) 0.0821L * atm/k *mol

T: 33 C (add 273 to get K) -> 306K

Move equation so n is on the side: PV/RT = n. Plug the numbers into the equation.

$\frac{1.02atm * 3.7L }{306K} * \frac{K * mol}{0.0821L *atm} = 0.15 mol$

Then, convert moles to grams using the molar mass of O2 which is 32g/mol.

$0.15 mol * \frac{32g}{mol}$ = 4.8g

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2 years ago