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nikitadnepr [17]
3 years ago
8

Will give free brainlist !! :)

Chemistry
2 answers:
luda_lava [24]3 years ago
7 0

Answer:

C is the correct answer

Explanation:

castortr0y [4]3 years ago
5 0

Answer:

C) 2920 J

Explanation:

have a happy day please can I have the brainlist I have bin trying to get one for a WEEK PLZ PLZ PLZ!!!

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Calculate the pH after 0.018 mole of HCl is added to 1.00 L of each of the four solutions. (Assume that all solutions are at 25°
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Explanation:

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- If x moles of electrons are transferred when 4.8 g of oxygen reacts with 4.8 g of
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2 years ago
If the pH of a phosphoric acid (H3PO4) solution is adjusted to 6.50, what is the most abundant species and which is the second m
maria [59]

Explanation:

For the given values of K_{a} we will have the values of pK as follows.

As,        pK_{a} = -log K_{a}

Therefore,

     pK_{a1} = 2.15,     pK_{a2} = 7.20

      pK_{a3} = 12.38

Now, at pH 6.50

      H_{3}PO_{4} \rightarrow H_{2}PO^{-}_{4} + H^{+};   K_{a1}

At pH = 2.15;  H_{3}PO_{4} = H_{2}PO^{-}_{4}

       H_{2}PO^{-}_{4} \rightarrow HPO^{2-}_{4} + H^{+};  K_{a2}

At pH 7.20;  H_{2}PO^{-}_{4} = HPO^{2-}_{4}

        HPO^{2-}_{4} \rightarrow PO^{3-}_{4} + H^{+};     K_{a3}

Hence, we can conclude that most abundant species is H_{2}PO^{-}_{4} and the second most abundant species is HPO^{2-}_{4}.

3 0
4 years ago
Which element act when you drop it in water ?
Dahasolnce [82]
Sorry, for the wait, the answer is rubidium.
5 0
4 years ago
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Answer:

a. neutral

b. salts

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Explanation:

Organic salts are a dense number of ionic compounds with innumerable characteristics. They are previously derived from an organic compound, which has undergone a transformation that allows it to be a carrier of a charge, and that in addition, its chemical identity depends on the associated ion.

Organic salts are usually stronger acids or bases than inorganic salts. This is because, for example, in the amine salts, it has a positive charge due to its bond with an additional hydrogen: A + -H. Then, in contact with a base, donate the proton to be a neutral compound again

RA + H + B => RA + HB

H belongs to A, but it is written as it is involved in the neutralization reaction.

On the other hand, RA + can be a large molecule, unable to form solids with a crystalline network stable enough with the hydroxyl anion or oxyhydrile OH–.

When this is so, salt RA + OH– behaves as a strong base; even as basic as NaOH or KOH

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