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Kisachek [45]
3 years ago
5

lead can react with oxygen gas. If lead (IV) oxide is the product of the reaction, how would the reaction be classified

Chemistry
1 answer:
slamgirl [31]3 years ago
7 0

Answer:

this reaction is an oxidation reaction

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[cu(nh3)4]2 forms a blue solution. when concentrated hcl is added to this solution, what color will the solution change to
g100num [7]
<span>[Cu(NH3)4]2+ forms a blue solution. When concentrated HCl is added to this solution, what color will the solution change to yellow.

Reason: 
When conc. HCl is added to the solution containing </span>[Cu(NH3)4]2+, Cl- ions will replace NH3 and form [Cu(Cl)4]2- complex. This can be understood for the following reaction:

[Cu(NH3)4]2+     +          Cl-          ↔         [Cu(Cl)4]2-      +        NH3

The Cl- ion is a weak field ligand, while NH3 is a strong field ligand. Hence, Cl- will in less splitting of d-orbitals, as compared to NH3. Due to this, photons of different energies will be absorbed by these complexes, and hence they display different colours.
8 0
3 years ago
Read 2 more answers
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kolbaska11 [484]

Answer:

469.9K

Explanation:

Using Charles's law equation:

V1/T1 = V2/T2

Where;

V1 = initial volume (ml)

V2 = final volume (ml)

T1 = initial temperature (K)

T2 = final temperature (K)

Based on the information provided:

V1 = 280.0ml

V2 = 440.0 ml

T1 = 26.0°C = 26 + 273 = 299K

T2 = ?

Using V1/T1 = V2/T2

280/299 = 440/T2

0.936 = 440/T2

T2 = 440 ÷ 0.936

T2 = 469.9K

3 0
3 years ago
Draw the structures of the starting materials needed to make 2-methylhept-3-yne in the spaces provided. The starting materials m
DIA [1.3K]

Answer: answered

Explanation:

4 0
3 years ago
Apple's "creative pros" and "evangelists," who help customers get the most out of their products and gain support for its produc
Nesterboy [21]

Answer:

They are most likely associated with the "Promotion" marketing mix element.

Explanation:

The marketing mix is made up of 7 elements which are:

-Product

-Price

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-Place

-Packaging

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Promotion

Promotion essentially includes all the methods,ways and means you inform your customers about your product or services and how one can market the products and make sales from them.Apple's "creative pros" and "evangelists" basically promote Apple products by their activities since they make the customers know more about what Apple products can do thereby getting support for the Apple product which serves as a form of publicity for the products and as the publicity increases it would increase the sales of Apple products.Just as advertising serves to increase sales.

8 0
3 years ago
The molality is temp independent whereas molarity is temperature dependent. Justify.
Elza [17]
Molality is obtained by dividing the number of moles of solute by the mass in kilogram of the solvent. None of the dimensions is dependent in temperature. On the other hand, molarity is obtained by dividing the number of moles of solute by the volume in liters of the solution. Volume is temperature dependent. 
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