Lead<span> (/lɛd/) is a chemical </span>element<span> in the carbon </span>group<span> with symbol Pb (from Latin: plumbum) and atomic </span>number<span> 82.
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Answer:
15 or 65 or 7
Explanation:
I am not sure which one, but i think it is one of these
Answer:
Concentration of solution B is 
Explanation:
Solution A: Total volume of solution A = (9.00+1.00) mL = 10.00 mL
According to law of dilution, 
where
and
are initial and final concentration respectively.
and
are initial and final volume respectively.
Here
=
,
= 1.00 mL,
= 10.00 mL
So,
= 
So, concentration of solution A = 
Solution B: Total volume of solution B = (2.00+8.00) mL = 10.00 mL
Similarly as above,
= 
So, concentration of solution B = 