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3 years ago

Predict which of the following transition metal ions has a color Cr3+, Cd2+, Hg2+, V2+

Chemistry

2 answers:

ANEK [815]3 years ago

8 0

Answer:Cr3+ and V2+

Explanation:

Cd and Hg belong to group 12 which is sometimes referred to as post transition elements. They possess a filled d subshell (d10). Remember that the colour of transition elements is attributed to the presence of partially filled d orbitals leading to transition between the three degenerate lower energy t2g orbitals and two higher energy degenerate eg orbitals. If the element has a d10 configuration, such transition is impossible, hence its ions will be colourless.

Delicious77 [7]3 years ago

4 0

Answer:

Cr3+ is green and V2+ is purple. Cr3+ and V2+ are both d3 so there can be a lot of movement between energy levels to produce colored light. Cd2+ and Hg2+ are both d10 (full d orbital, much less electron movement).

Explanation:

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2 years ago

when carbon is burned in the air, it reacts with oxygen to form carbon dioxide. when 22.8 g of carbon were burned in the presenc

OverLord2011 [107]

Answer:

So there is83.6g CO2 produced

Explanation:

Burning carbon with air has the following equation

C + O2 → CO2

For 1 mol Carbon, we have 1 mol O2 and 1 mol CO2

Step 2: Calculating moles

mole C = 22.8g / 12g/mole

Mole C = 1.9 mole

1.9 mole C will completely react

Since for each mole C there is 1 mole O2 and 1 mole CO2

This means there will also react 1.9 mole of 02, to be formed 1.9 mole of CO2

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mass CO2 = 1.9 mole CO2 * 44g/mole =<u>83.6g CO2</u>

In this reaction 18.2 g of O2 remained unreacted

we can control this: 79g - 18.2 g = 60.8g

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So there is83.6g CO2 produced

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3 years ago

when carbon dioxide is bubbled through lime water the solution first turn milky and to colour less . Explain why these changes o

Annette [7]

Answer:

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Explanation:

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The contribution to the nature of light-

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Albert Einstein proposed the quantum theory of light. He determined that light exists in discrete quanta of energy called photons.

To learn more about the nature of light, visit: brainly.com/question/4423091

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2 years ago

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Answer:

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Explanation:

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