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liubo4ka [24]
2 years ago
8

2) explain why Ce(iii) with a 4f1 configuration is colourless and Ce(iv) with 4f0 configuration is red?​

Chemistry
1 answer:
kykrilka [37]2 years ago
5 0

Answer:

Don't know don't know don't know

Explanation:

sorry for the disturb ment the UK. I have been a while. I think it would have been in touch and go to bed now. The list is not the only way I am not sure 2 to the top right of the most of the most important things. It has been a 22nd. This will help us improve your chances are you looking 8 the best way for the use of this message. Any delivery times stated that the UK. The comments. I have been a while. I have been a while. I have been a while. How do we have a look at the end. I have been a while. I have been a while. I have been a long term. I have been a while. I have been a while. I have been a while

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Is thiamine mononitrate an ionic bond or covalent bond?
timofeeve [1]
It is a covalent bond. Whenever a compound uses such suffixes like mono, di, tri, tetra, and so on, it is a covalent compound- thus having covalent bonds.
7 0
3 years ago
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Which of these takes place when a chemical change occurs? option 1: Bonds connecting atoms in products and reactants form. optio
Tamiku [17]

Answer: Out of the given options bonds connecting atoms in reactants break, and bonds connecting atoms in products form are the changes which takes place when a chemical change occurs.

Explanation:

A change that leads to the change in chemical composition of a substance is called a chemical change.

For example, 2NH_{3} \rightarrow N_{2} + 3H_{2}

Here, bond between the reactant atoms nitrogen and hydrogen is broken down.

On the other hand, bond connecting the products that is N_{2} and H_{2} is formed.

Thus,, we can conclude that out of the given options bonds connecting atoms in reactants break, and bonds connecting atoms in products form are the changes which takes place when a chemical change occurs.

4 0
3 years ago
A closed system initially containing 1×10^-3 hydrogen 2×10^-3M iodine at 448 degree Celsius and is allowed to reach equilibrium.
GaryK [48]

Answer:

Kc = 50.5

Explanation:

We determine the reaction:

H₂  +  I₂   ⇄   2HI

Initially we have 0.001 molesof H₂

and 0.002 moles of I₂

If we have produced 0.00187 moles of HI in the equilibrium we have to know, how many moles of I₂ and H₂, have reacted.

           H₂     +      I₂      ⇄   2HI

In:     0.001       0.002           -

R:       x                 x                2x

Eq:  0.001-x    0.002-x      0.00187  

x = 0.00187/2 = 9.35×10⁻⁴ moles that have reacted

So in the equilibrium we have:

0.001 - 9.35×10⁻⁴ = 6.5×10⁻⁵  moles of H₂

0.002 - 9.35×10⁻⁴ = 1.065×10⁻³ moles of I₂

Expression for Kc is =  (HI)² / (H₂) . (I₂)

0.00187 ² /  6.5×10⁻⁵ . 1.065×10⁻³ = 50.5

5 0
3 years ago
A working model used to test a design is called a
Lisa [10]

Answer:

A working model used to test a design is called a

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3 years ago
If you wanted to look at a cell wall which type of cell would you observe ​
dimaraw [331]

Answer:

You could observe the cell wall in all kingdoms except for the animals. That would be cells of plants, protists (algae), fungi, bacteria and achaea.

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