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Zina [86]
4 years ago
6

How many nitrogen atoms are in 4.24 x 1022 molecules of Ca (NO3)2 ?

Chemistry
1 answer:
horsena [70]4 years ago
6 0

Answer:

                       8.48 × 10²² atoms of Nitrogen

Explanation:

                   Calcium Carbonate is an ionic compound made up to Calcium (Ca²⁺) and Nitrate (NO₃⁻) ions. Also, the subscript 2 after the closed bracket after NO₃ specifies that there are two moles of NO₃⁻ in calcium nitrate compound. Hence, in total we can say that this compound contain,

                                    1 atom of Calcium

                                    2 atoms of Nitrogen

                                    6 atoms of Oxygen

Therefore,

When,

              1 molecule of Ca(NO₃)₂ contains  =  2 atoms of Nitrogen

Then,

   4.24 × 10²² molecules of Ca(NO₃)₂ will contain  = X atoms of Nitrogen

Solving for X,

                      X  =  2 atoms × 4.24 × 10²² molecule / 1 molecule

                      X =  8.48 × 10²² atoms of Nitrogen

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0.34 moles of gas would be contained in a 11.2 L container that is at a pressure of 0.75 atm and 300 K.

<h3>HOW TO CALCULATE NUMBER OF MOLES?</h3>

The number of moles of a substance can be calculated using the following expression:

PV = nRT

Where;

  • p = pressure (atm)
  • v = volume (L)
  • n = number of moles
  • R = gas law constant
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0.75 × 11.2 = n × 0.0821 × 300

8.4 = 24.63n

n = 8.4 ÷ 24.63

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Therefore, 0.34 moles of gas would be contained in a 11.2 L container that is at a pressure of 0.75 atm and 300 K.

Learn more about number of moles at: brainly.com/question/1190311

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