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4 years ago

Can the absolute energy states of the reactants (E1) and products (E2) be measured in a chemical reaction?

2 answers:

6 0

No it can not the absolute energy states of the reactants (E1) and products (E2) be measured in a chemical reaction
hope it helps

rodikova [14]4 years ago

5 0

Answer:

No we cannot measure absolute energy states.

Explanation:

The absolute energy state means the internal energy of any molecule, either reactant or product. We cannot measure the internal energy of any reactant or product as internal energy or absolute energy is sum of all kind of energy including kinetic energy, vibration energy etc.

However we can measure the changes in these energy during any chemical process.

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Which of the examples is potassium? es ) A) B) B C)

Nikitich [7]

Answer:

examples of things which contain potassium are:

green vegetables

root vegetables

fruits

potassium chloride

potassium sulphate

Explanation:

if you need a specific answer please send the options

7 0

3 years ago

Determine the pH of 0.050 M HCN solution. HCN is a weak acid with a Ka equal to 4.9 x 10-10 DONE

nadezda [96]

Answer:

The pH of the solution is 5.31.

Explanation:

Let " $\alpha$ is the dissociation of weak acid - HCN.

The dissociation reaction of HCN is as follows.

$HCN+H_{2}O\rightarrow H_{3}O^{+}+CN^{-}$

Initial C 0 0

Equilibrium c(1- $\alpha$ ) c $\alpha$ c $\alpha$

Dissociation constant = $Ka= c\alpha \times \frac{c\alpha}{c(1-\alpha)}$

$=\frac{c\alpha^{2}}{(1-\alpha)}$

In this case weak acids $\alpha$ is very small so, (1- $\alpha$ ) is taken as 1.

$Ka=C\alpha^{2}$

$\alpha=\sqrt\frac{ka}{c}$

From the given the concentration = 0.050 M

Substitute the given value.

$\alpha=\sqrt\frac{4.9\times 10^{-10}}{0.05}=9.8\times 10^{-4}$

$[H_{3}O^{+}]=c\alpha$

$[H_{3}O^{+}]=0.05\times 9.8\times 10^{-4}= 4.9\times10^{-6}$

$pH= -log[H_{3}O^{+}]$

$=-log[4.9\times10^{-6}]$

$=6-log 4.9= 5.31$

Therefore, The pH of the solution is 5.31.

7 0

3 years ago

Read 2 more answers

What type of plate boundary is shown in the diagram below?

ryzh [129]

Answer : The second one

8 0

3 years ago

HELP? What is the major difference between an ion and a dipole?

Anastasy [175]

Answer:

Key differences between ion/ion and ion/dipole interactions

Ion-ion interactions fall off slower than ion-dipole. Tripling the distance between two ions reduces the energy by 1/3, while tripling the distance between the ion and a dipole reduces it by 1/9

Letter answer: B

Explanation:

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4 years ago

Select the atoms that are likely to gain electrons to form anions:

aliina [53]

Answer:

Explanation:

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3 years ago