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Dominik [7]
2 years ago
15

What is the percent composition ca(oh)2

Chemistry
1 answer:
Salsk061 [2.6K]2 years ago
4 0

Answer:  43.188%

Explanation:

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The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti
Paul [167]

Answer:

Option B. +3 and +6

Explanation:

<em>Zeff</em> = <em>z - s</em>

where <em>z</em> is the atomic number, <em>s</em> is the number of shielding(non-valence) electrons

For Boron, electronic configuration is 1s²2s³.

z = 5, s = 2

Zeff = 5 - 2 = +3

For Oxygen, electronic configuration is 1s²2s²2p⁴

z = 8, s = 2

Zeff = 8 - 2 = +6

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2 years ago
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djyliett [7]

Answer:

The outermost energy shell of an atom likes to be full with 8 electons

Explanation:

4 0
2 years ago
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grin007 [14]
Global wind patterns are mainly determined by unequal heating of the earth's surface, changes in air pressure, and earth's rotation. Change in air pressure: Air mainly circulates due to change in air pressure. It moves from a region of high air pressure to the region of lower air pressure.
3 0
2 years ago
Approximately how many moles of chlorine make up 1.79 × 1023 atoms of chlorine?
e-lub [12.9K]
1.2*10^24# atoms of chlorine

Explanation:
Chlorine gas (#Cl_2#) has two atoms of elemental chlorine in a molecule, so:
#1# mol of #Cl_2# have #6*10^23# molecules of #Cl_2#
#1# molecule of #Cl_2# have #2# atoms per molucule
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