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CH4 + 4Cl2–>CCl4 + 4HCl if 9.32 grams of CH4 react with 2.71 grams Cl2 how many grams of CCl4 will be produced?
In first, You must to definite the excess substance in this case. Let's look to given reaction:CH4 + 4Cl2–>CCl4 + 4HClIt follows from it, that for 16 g CH4 need...
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Calculate the boiling point elevation of an aqueous solution where enough urea (CH₄N₂O) is added to make a 0.45 molal solution. Use the boiling point elevation constant of water.
Boiling point elevation= Kb is 1.712oC/m
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What is the molality of the electrolyte solution of sodium acetate with the boiling point of solution at 108 5 °C? K of solvent is 0.52 °C/m Tb=100
108.5/0.52= 208.65= 208.65/100= 2.09M
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A Zn rod is dipped in 100ml 1M solution so that molality of Cu2+ change to 0.7M.the molality of SO4 ion at this stage will be
When immersed in asolution of the rod, sulfate ions can not participate in the reaction. Zn + Cu2+ =gt; Zn2+ + Cu Therefore, the concentration of sulfate ions stays unchanged....
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What is the boiling point of a solution that contains 12.5g biphenyl, C12H10, in 100g of bromobenzene? The normal boiling point of bromobenzene is 156°C, and kb for bromobenzene is +6.26°C/m.
∆ T = mKbMolar mass of bromobenzene = 157.02 g/mol100/157.02= 0.64molMolar mass of biphenyl= 154.2112.5/154.21= 0.081mol0.64+0.081= 0.721×6.26= 4.51= 4.51+156= 160.51°C
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What is the effect of a small amount of impurity on the melting point of an organic compound?
Decreases melting point
Elevates melting point
Stagnates melting point
None of the above
A small amount of impurity decreases melting point an organic compound
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Which one of the following species have the same shape?
A. CO2 and CCL4
B. CO2 and O3
C. O3 and CCL4
D. O3 and NO2-
Option D. Nitrite ion and ozone are in sp2 hybrid state
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What is the boiling point of a solution that contains 38.7 grams of naphthalene, C10H8,
dissolved in 211gram of benzene? The boiling point of pure benzene is 80.10 °C. köp = 2.53 °C/m
76.47
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What is the boiling point of a 0.66 molal solution of sucrose (nonelectrolyte) in ethanol? (Kb of ethanol = 1.22 °C/m, normal boiling point of ethanol is 78.5 °C)
∆Tb=Kb*Cm=1.22*0.66=0.81 °C;Tb(solution)=78.5 - ∆Tb=77.69 °C;Answer: 77.69°C
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The heat needed to vaporize a certain amount of liquid. A certain substance A has a boiling point of 78 degrees celcius and substance B has boiling point of 100 degrees celcius
A ‒ boiling point TB = 78 ⁰CB ‒ boiling point TB = 100 ⁰CLiquids are called condensed phases because their particles are packed in close proximity to one another....
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