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Masja [62]
3 years ago
6

If an aqueous solution of lead(II) nitrate (Pb(NO3)2) is mixed with an aqueous solution of potassium chloride (KCl) the precipit

ate is:
Chemistry
1 answer:
saul85 [17]3 years ago
8 0

Answer: lead(II) chloride PbCl2

Explanation:

Pb(NO3)2 + 2KCl —> PbCl2 + 2KNO3

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What is the vapor pressure of an aqueous solution made up of 60.0g of urea (CH4N2O) in 180g of water? the vapor pressure of wate
djyliett [7]
To get the answer you use the Law of Raoult.


Raoult's law states that the decrease of the vapor pressure of a liquid is proportional to the molar fraction of the solute.


ΔP = Pa * Xa


Here Pa = 0.038 atm


And Xa = N a / (Na + Nb), where Na is number of moles of A and Nb is number of moles of b


Na = mass of urea / molar mass of urea =  60 g / (molar mass of CH4N2O)


molar mass of CH4N2O = 12 g/mol + 4*1g/mol + 2*14 g/mol + 16 g/mol = 60 g/mol


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Xa = 1 mol / (10 mol + 1 mol) = 1/11 =0.09091


ΔP = Pb * Xa = 0.038 atm * 0.09091 =  0.0035 atm


Then, the final vapor pressure of water is Pb - ΔP = 0.038atm - 0.0035atm = 0.035 atm.


 Answer: 0.035 atm
7 0
3 years ago
Sodium oxide contains Na+ ions and O2- ions.<br> Give the formula of sodium oxide
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To be honest, I learned this in school so I'll tell you XD

The formula of sodium oxide is Na2O
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Yuki888 [10]

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1 year ago
Which chemical family tends to get rid of electrons by forming a compound
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