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Law Incorporation [45]
3 years ago
8

There are 1.204 x 10^24 atoms of oxygen. How many moles is this?

Chemistry
1 answer:
Nastasia [14]3 years ago
7 0

Answer:

7.25 x 10^47

Explanation:

1.204 x 10^24 moles*6.022 x 10^23 avogadro's number= 7.25 x 10^

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Vinvika [58]

find the answer in the attached image. please mark as brainliest if it is helpful.

7 0
3 years ago
Write a balanced net ionic equation for the following reaction. Explain how you arrived at this answer. What did you cancel out?
yaroslaw [1]

 The net ionic equation  is


Ag⁺(aq)  +Cl⁻(aq) →  AgCl(s)


Explanation


AgNO₃ (aq)  + KCl (aq)→ AgCl(s) +KNO₃(aq)



from above  molecular equation break  all  soluble electrolyte  into ions


Ag⁺(aq) +NO₃⁻ (aq) + K⁺(aq) +Cl⁻(aq) →   AgCl (s) + K⁺(aq) + No₃⁻(aq)



cancel the spectator  ions  in both side  of  equation =K⁺  and NO₃⁻  ions



The net  ionic equation is therefore


= Ag⁺(aq)  + Cl⁻(aq) →    AgCl(s)

8 0
4 years ago
Which of the following has the lowest Ka?a. carbonic acid b. dihydrogen phosphate c. phosphoric acid d. bicarbonate
Naya [18.7K]

Explanation:

A compound or molecule which will have least dissociation and that is not able to given hydrogen ion easily upon dissociation will also have a low value of K_{a}.

Dissociation of the given compounds or species will be as follows.

 H_{2}CO_{3} \rightleftharpoons H^{+} + HCO^{-}_{3}

 H_{2}PO^{-}_{4} \rightleftharpoons H^{+} + HPO^{-}_{4}

 H_{3}PO_{4} \rightleftharpoons H_{+} + H_{2}PO^{-}_{4}

As, chemical formula of bicarbonate is HCO^{-}_{3} and due to the presence of a negative charge it is difficult to lose a positively charged hydrogen ion. This is because oppositely charged ions will be bonded by strong force of attraction.

Hence, it will not easily lose a hydrogen ion due to which bicarbonate has the lowest K_{a}.

Thus, we can conclude that out of the given species bicarbonate has the lowest K_{a}.    

7 0
3 years ago
what is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants
Rama09 [41]
This reaction would produce salt and water- Sodium Sulphate and Water.

H₂SO₄ + 2NaOH  →  Na₂SO₄ +  2H₂O
4 0
3 years ago
A solution of salt water is boiled. The water evaporates and solid salt remains. Which statement is true?
Scorpion4ik [409]
C because neither the water or salt have changed their molecular structure. H2O is still H2O and NaCl is still NaCl.
4 0
4 years ago
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