Answer:
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Explanation:
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Neo-pentane represents the Compound A while compound B is n-pentane.
After careful consideration we can say that compounds A and B are alkanes and also isomers of pentane. In chemistry, Isomers are defined as compounds having same empirical molecular formula but different structural formulas due to varying arrangement of atoms.
Now, as per the question statement, compound A gives a single monochlorination product upon heating with the molecule of chlorine i.e. Cl2 showing that the molecule is extremely symmetric. This molecule must be neo-pentane. Refer to image 1.
Similarly, Compound B forms 3 constitutional isomers after undergoing monochlorination. This compound must be n-pentane since three are 3 different types of carbon atoms in the structure. Refer to image 2.
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Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011% Pb by mass. 13.6 × 10³ ml water contains 150 mg of Pb.
<h3>How to calculate the mass of solution ? </h3>
Given percentage of Pb present in the sample solution is 0.0011%
That means 0.0011 grams of Pb present in the 100g of solution.
So,
= ![\frac{0.150\ \text{g Pb} \times 100\ \text{g water}}{0.0011\ \text{g of Pb}}](https://tex.z-dn.net/?f=%5Cfrac%7B0.150%5C%20%5Ctext%7Bg%20Pb%7D%20%5Ctimes%20100%5C%20%5Ctext%7Bg%20water%7D%7D%7B0.0011%5C%20%5Ctext%7Bg%20of%20Pb%7D%7D)
= 13.6 × 10³ g water
<h3>What is Density ? </h3>
The mass per unit volume is called density. Density is represented as D or ρ.
It is expressed as:
![\rho = \frac{m}{V}](https://tex.z-dn.net/?f=%5Crho%20%3D%20%5Cfrac%7Bm%7D%7BV%7D)
where,
ρ = Density
m = mass of the object
V = Volume of object
Now put the value in above expression we get
![\rho = \frac{m}{V}](https://tex.z-dn.net/?f=%5Crho%20%3D%20%5Cfrac%7Bm%7D%7BV%7D)
![1\ g/ml = \frac{13.6 \times 10^3}{V}](https://tex.z-dn.net/?f=1%5C%20g%2Fml%20%3D%20%5Cfrac%7B13.6%20%5Ctimes%2010%5E3%7D%7BV%7D)
V = 13.6 × 10³ ml
Thus from the above conclusion we can say that Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011% Pb by mass. 13.6 × 10³ ml water contains 150 mg of Pb.
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