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ella [17]
1 year ago
5

Aqua regia, a mixture of concentrated HNO₃ and HCl, was developed by alchemists as a means to "dissolve" gold. The process is a

redox reaction with this simplified skeleton reaction: \mathrm{Au}(s)+\mathrm{NO}_{3}^{-}(a q)+\mathrm{Cl}^{-}(a q) \longrightarrow \mathrm{AuCl}_{4}^{-}(a q)+\mathrm{NO}_{2}(g) (b) What are the oxidizing and reducing agents?
Chemistry
1 answer:
pav-90 [236]1 year ago
6 0

a) Balanced equation;

Au +3 NO^{-}  _{3} +4Cl^{- }+6H^{+} ⇒ AuCl^{-}_{4}  + 3NO_{2} + 3H_{2} O

b) oxidizing agent: N

    reducing agent: Au

a) The unbalanced redox equation is as follows:

Au + NO^{-}  _{3} +Cl^{- }+H^{+} ⇒ AuCl^{-}_{4}  + NO_{2} + H_{2} O

Balance all atoms other than H and O.

Au + NO^{-}  _{3} +4Cl^{- }+H^{+} ⇒ AuCl^{-}_{4}  + NO_{2} + H_{2} O

The oxidation number of gold changes from 0 to +3. The change in the oxidation number of gold is 3.The oxidation number of nitrogen changes from +5 to +4. The change in the oxidation number of nitrogen is 1.

So,

Au +3 NO^{-}  _{3} +4Cl^{- }+H^{+} ⇒ AuCl^{-}_{4}  + 3NO_{2} + H_{2} O

Now balance O atoms on RHS,

Au +3 NO^{-}  _{3} +4Cl^{- }+H^{+} ⇒ AuCl^{-}_{4}  + 3NO_{2} + 3H_{2} O

Now, balance hydrogen atoms on RHS,

Au +3 NO^{-}  _{3} +4Cl^{- }+6H^{+} ⇒ AuCl^{-}_{4}  + 3NO_{2} + 3H_{2} O

This is the balanced chemical equation.

b) oxidizing agent: N

    reducing agent: Au

Learn more about oxidation number here;

brainly.com/question/12854037

#SPJ4

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Part C: complete the third column <br> Part D: complete the fourth column
Helga [31]

Answer:

Part C: P2 = 0.30 atm

Part D: V1 = 16.22 L.

Explanation:

Part C:

Initial pressure (P1) = 2.67 atm

Initial volume (V1) = 5.54 mL

Final pressure (P2) =.?

Final volume (V2) = 49 mL

The final pressure (P2) can be obtained as follow:

P1V1 = P2V2

2.67 x 5.54 = P2 x 49

Divide both side by 49

P2 = (2.67 x 5.54)/49

P2 = 0.30 atm

Therefore, the final pressure (P2) is 0.30 atm

Part D:

Initial pressure (P1) = 348 Torr

Initial volume (V1) =?

Final pressure (P2) = 684 Torr

Final volume (V2) = 8.25 L

The initial volume (V1) can be obtained as follow:

P1V1 = P2V2

348 x V1 = 684 x 8.25

Divide both side by 348

V1 = (684 x 8.25)/348

V1 = 16.22 L

Therefore, the initial volume (V1) is 16.22 L

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Answer: b

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Answer:

Hey mate....

Explanation:

This is ur answer.....

<em>Iron is an essential element for blood production. About 70 percent of your body's iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin. Hemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues. Myoglobin, in muscle cells, accepts, stores, transports and releases oxygen.</em><em> </em><em>About 6 percent of body iron is a component of certain proteins, essential for respiration and energy metabolism, and as a component of enzymes involved in the synthesis of collagen and some neurotransmitters. Iron also is needed for proper immune function.</em><em> </em><em>About 25 percent of the iron in the body is stored as ferritin, found in cells and circulates in the blood. The average adult male has about 1,000 mg of stored iron (enough for about three years), whereas women on average have only about 300 mg (enough for about six months). When iron intake is chronically low, stores can become depleted, decreasing hemoglobin levels.</em><em> </em><em>When iron stores are exhausted, the condition is called iron depletion. Further decreases may be called iron-deficient erythropoiesis and still further decreases produce iron deficiency anemia.</em>

Hope it helps!

Brainliest pls!

Follow me! :)

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