4 years ago

What is the difference between primary and secondary pollutants?

Chemistry

2 answers:

jeka57 [31]4 years ago

5 0

Primary pollutants affect the world more than secondary pollutants

Ne4ueva [31]4 years ago

5 0

A primary pollutant is an air pollutant emitted directly from a source a secondary pollutant is not directly emitted as much

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3 years ago

5. 16.3 g of NaCl is dissolved in water to make 1.75 L of solution. What is the molarity of this solution? A 0.159 M B 0.278 M C

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Number of moles is defined as the mass of substance divided by its molar mass.

Hence, moles of NaCl (molar mass = 58.44 g/mol) ar calculated as follows.

$Moles = \frac{mass}{molar mass}\\= \frac{16.3 g}{58.44 g/mol}\\= 0.278 mol$

Molarity is the number of moles of a substance present in a liter of solution.

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$Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.278 mol}{1.75}\\= 0.159 M$

Thus, we can conclude that the molarity of this solution is 0.159 M.

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