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Juliette [100K]
4 years ago
8

Why do we crush solids before putting them into a solvent

Chemistry
1 answer:
stiks02 [169]4 years ago
7 0
To increase the surface area of the solute, which allows it to dissolve faster.
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Draw the Lewis dot structure for RbIO2. Include all hydrogen atoms and nonbonding electrons. Show the formal charges of all atom
Rzqust [24]

Answer : The Lewis-dot structure of RbIO_2  is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, RbIO_2

As we know that rubidium has '1' valence electrons, iodine has '7' valence electrons and oxygen has '6' valence electrons.

Therefore, the total number of valence electrons in RbIO_2 = 1 + 7 + 2(6) = 20

As we know that RbIO_2  is an ionic compound because it is formed by the transfer of electron takes place from metal to non-metal element.

7 0
3 years ago
(I’m timed please help) What occurs during a solar eclipse? Check all that apply
Ymorist [56]

Answer:

the moon is between the earth and the sun

Explanation:

☀️ = solar eclipse

5 0
3 years ago
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Ede4ka [16]

i think it's the last answer!

8 0
3 years ago
Detailed explanation of why the sky is blue
Orlov [11]
The reason why the sky is blue is because it is reflecting off of the sky and when it is evening its losing light
6 0
3 years ago
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If the rate of decrease for the partial pressure of N2H4N2H4 in a closed reaction vessel is 70 torr/htorr/h , what is the rate o
german

Answer:

r_{NH_3}=140torr/h

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

N_2H_4 (g) + H_2 (g) \rightarrow 2 NH_3

Thus, in terms of pressures, the rate becomes:

-r_{N_2H_4}=\frac{1}{2} r_{NH_3}

Thus, the rate of change for the partial pressure of ammonia turns out:

r_{NH_3}=2*(-r_{N_2H_4})\\r_{NH_3}=2*[-(-70torr/h)]\\r_{NH_3}=140torr/h

The rate of decrease of partial pressure of urea is taken negative as it is a reactant whereas ammonia a product which has 2 as its stoichiometric coefficient.

Best regards.

7 0
3 years ago
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