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3 years ago

The chemical formula of calcium oxide is Cao. What is the valency of calcium?

Chemistry

2 answers:

alexandr402 [8]3 years ago

8 0

Answer:

Explanation:

In calcium oxide, the calcium is electropositive in nature and to fulfil its octet, the calcium atoms lose two electrons to form the calcium cations whose valency is 2, hence the corresponding anion, i.e. the oxide anion must also have valency 2 to balance the positive charge on the calcium cation.

Hope this helps... 0_0

kykrilka [37]3 years ago

7 0

Lets look out the Electronic configuration of Calcium(Ca)

Z=20

EC:-

$\\ \rm\longmapsto 1s^22s^22p^63s^2$

Valency is 2

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A mixture of carbon dioxide and helium gases is maintained in a 7.91 L flask at a pressure of 1.42 atm and a temperature of 33 °

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Answer:

The gas mixture contains 1.038 grams of helium

Explanation:

Step 1: Data given

Volume of the flask = 7.91 L

Total Pressure = 1.42 atm

Temperature = 33 °C

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Step 2: Calculate total number moles of gas

p*V = n*R*T

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⇒ V = the volume = 7.91 L

⇒ n= the number of moles = TO BE DETERMINED

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⇒ T = the temperature = 33 °C = 306 Kelvin

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3 years ago

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Vadim26 [7]

Answer:

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