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Flauer [41]
2 years ago
12

Which of the following questions can be answered by science?

Chemistry
2 answers:
Irina18 [472]2 years ago
7 0

Answer:

A. What is the composition of air?, B. Should the driving age be reduced?, D.

Should students be allowed to bring toys to school? Answer: A,B,D.

Hunter-Best [27]2 years ago
6 0

Answer:

<h2><em><u>(</u></em><em><u>a</u></em><em><u>)</u></em><em><u>,</u></em><em><u> </u></em><em><u>(</u></em><em><u>b</u></em><em><u>)</u></em><em><u> </u></em><em><u>and</u></em><em><u> </u></em><em><u>(</u></em><em><u>c</u></em><em><u>)</u></em><em><u> </u></em><em><u>I</u></em><em><u> </u></em><em><u>guess</u></em></h2>
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How many grams of Pb are contained in a mixture of 0.135 kg each of PbCl(OH) and Pb2Cl2CO3?
Dahasolnce [82]

Hey there!:

Given the mass of PbCl(OH) :

0.135 Kg = 0.135 Kg*(1000g / 1Kg)  = 135 g

Molecular mass of PbCl(OH)  = 207+35.5+16+1  = 259.5 g / mol

Atomic mass of Pb = 207 g/mol

Hence mass of Pb in 135 g  PbCl(OH)  :

(207 g Pb /  259.5 g PbClOH) * 135g PbClOH  =

0.79768 * 135 =>  107.68 g of Pb

For Pb2Cl2CO3  :

Given the mass of Pb2Cl2CO3  :

0.135 Kg = 0.135 Kgx(1000g / 1Kg)  = 135 g

Molecular mass of Pb2Cl2CO3  = 2*207+2*35.5+12+3*16  = 545 g / mol

Mass of Pb present in 1 mol (=545 g / mol) of Pb2Cl2CO3  = 2*207 = 414 g

Hence mass of Pb in 135 g  Pb2Cl2CO3:

(414 g Pb /  545 g PbClOH) * 135g PbClOH  =

0.75963 * 135 => 102.55 g of Pb2Cl2CO3


Hope that helps!

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Copper is typically a solid and has a coppery, bronzy color. It is a metal and has a relatively high melting point. It has a strong luster and can conduct electricity.

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