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2 years ago

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

Chemistry

2 answers:

alexandr402 [8]2 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]2 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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Rufina [12.5K]

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Explanation :

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2 years ago

160 g or an element with a molar mass of 40 = __ moles?

IRISSAK [1]

Answer:

4 moles

Explanation:

The formula of finding moles is

moles = mass / molar mass, therefore

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3 years ago

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ahrayia [7]

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3 years ago

Read 2 more answers

How many moles are in 3.57 x 10 32 particles Ca?

valentina_108 [34]

Answer:

$\boxed {\boxed {\sf 592,826,303.6 \ moles \ of \ Ca }}$

Explanation:

To convert from moles to particles, we must Avogadro's Number.

$6.022*10^{23}$

This number tells us the number of particles (atoms, ions, molecules, etc.) in 1 mole of a substance. In this case, it is the particles of calcium in 1 mole of calcium.

$6.022*10^{23} \ particles \ Ca / mole \ Ca$