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4 years ago

I need help plzzz help me!!!

Chemistry

1 answer:

Charra [1.4K]4 years ago

7 0

D.Nitrogen. Hydrogen. Ammon.

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At a certain temperature the rate of this reaction is first order in HI with a rate constant of 0.0632 s

kirza4 [7]

Answer:

$28.037\ \text{s}$

Explanation:

$[A]_0$ = Initial concentration = 1.28 M

$[A]$ = Final concentration = $0.17[A]_0$

k = Rate constant = 0.0632 s

t = Time taken

For first order reaction we have the relation

$kt=\ln\dfrac{[A]_0}{[A]}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{[A]}}{k}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{0.17[A]_0}}{0.0632}\\\Rightarrow t=28.037\ \text{s}$

Time taken to reach the required concentration would be $28.037\ \text{s}$ .

8 0

3 years ago

How do you determine if and ion has a<br> noble-gasconfiguration?

Soloha48 [4]

Explanation:

Noble gas configuration is defined as the configuration which contains completely filled orbitals.

For example, oxygen atom when gain two electrons then it forms oxygen ion ( $O^{2-}$ ).

Atomic number of oxygen atom is 8 and so, its number of electrons will also be 8. But when it gain two electrons then it has total 10 electrons. Hence, electronic configuration of $O^{2-}$ is as follows.

$1s^{2}2s^{2}2p^{6}$

Since, there are completely filled orbitals in an $O^{2-}$ ions. Therefore, it means this ion has a noble-gas configuration.

Thus, we can conclude that any specie which shows completely filled orbitals will have noble-gas configuration.

3 0

4 years ago

A chemist uses 4.0 L of sulfuric acid solution to produce 3.2 gram of product. How much of the same sulfuric acid solution is ne

____ [38]

The concept that can be used in order to determine the answer to this item is that of ratio and proportion. The ratio of the mass of the product to the sulfuric acid solution used in the first set should be proportional to that of the second. If we let x be the volume of the acid then, the equation that can be used is,

3.2 g / 4 L = 8 g / x L

The value of x from the equation is 10.

<em>ANSWER: 10 L</em>

7 0

3 years ago

A fault is a break in the rocks of the Earth's crust. A fault is formed due to the movement of rock on either side of the fault.

SVEN [57.7K]

Answer:

Ola tudo bem??

Meu nome é Ana Kesia, e o seu?

Foi mal, Nn consegui responder sua pergunta!

Mais mesmo assim obrigada pelos pontos!

Qualquer dúvidas estou aqui para ajudar!

Boa tarde, Tchau.

4 0

3 years ago

What is the invisible area of force extending out from the poles?

Nitella [24]

Answer:

Magnetic field

Explanation:

8 0

3 years ago