Do this and ill do one of your questions
1 answer:
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Answer:
Ne
Explanation:
Atomic number of Ne is 10.
Electronic configuration of Ne:
Octet of Ne is complete . Element having complete octet are stable and behave ideal gas.
and
are reactive and hence, does not behave as ideal gas.
Answer:
249.94ppm
Explanation:
Given parameters:
Mass of Pb(NO₃)₂ = 0.025g
Mass of water = 100g
Unknown:
Concentration of solution in ppm = ?
Solution:
Concentration in parts per million gives the amount of solute found in a million units of the solution. They are desirable for expressing very small amount of solutes in a large solution. For example, the level of arsenic in the soil.
Concentration in ppm =
A solution is made up of solute and solvent. The solvent here is water.
mass of solution = mass of solute + mass of solvent = 0.025 + 100 = 100.025g
Concentration in ppm = = 249.94ppm