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aleksley [76]
4 years ago
5

How many electrons will a calcium (ca) atom gain or lose in forming an ion?

Chemistry
1 answer:
Yuliya22 [10]4 years ago
4 0
Calcium has an atomic number 20. This means that calcium has 20 electrons.
The electronic configuration of these 20 electrons is as follows: 2,8,8,2

For the calcium to become stable, it should have eight electrons in its outermost energy level.
Based on this, calcium loses two electrons to form an ion and become stable.
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Answer:

1223.38 mmHg

Explanation:

Using ideal gas equation as:

PV=nRT

where,  

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V is the volume

n is the number of moles

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R is Gas constant having value = 62.3637\text{ L.mmHg }mol^{-1}K^{-1}

Also,  

Moles = mass (m) / Molar mass (M)

Density (d)  = Mass (m) / Volume (V)

So, the ideal gas equation can be written as:

PM=dRT

Given that:-

d = 1.80 g/L

Temperature = 32 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T = (32 + 273.15) K = 305.15 K

Molar mass of nitrogen gas = 28 g/mol

Applying the equation as:

P × 28 g/mol  = 1.80 g/L × 62.3637 L.mmHg/K.mol × 305.15 K

⇒P = 1223.38 mmHg

<u>1223.38 mmHg must be the pressure of the nitrogen gas.</u>

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Answer:

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