The correct answer is B) Limiting.
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Answer:
B: Limiting
Explanation:
The limiting reactant regulates the amount of products produced, because you have the least amount of the limiting reactant.
Benzoic acid is separated from acetanilide using sodium bicarbonate by converting it into sodium benzoate, which is soluble in water. Acetanilide remains unaffected in the mixture.
In the process of separating benzoic acid from acetanilide using sodium bicarbonate, the basic nature of sodium bicarbonate reacts with the acidic benzoic acid, leading to the formation of sodium benzoate. The sodium benzoate is highly soluble in water, allowing it to be easily separated from the acetanilide, which remains insoluble. On the other hand, acetanilide is not affected by the sodium bicarbonate and remains unaffected in the mixture.
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Answer:
Wurzite has a higher Madelung constant when compared with Sphalerite therefore Wurizite is more stable.
Explanation:
Zinc Sulphide is a chemical compound that exhibits polymorphism. This means Zinc Sulphide can exists in different forms as a compound. Zinc Sulphide has two common polymorphs named; Wurtzite and Sphalerite .
This two polymorphs are crystalline in structure. Wurtzite is hexagonal in shape while Sphalerite is cubic in shape.
Madelung constant was named after German Physicist Erwin Madelung. Madelung constant is dependent on the the way ions are arranged in a solid substance or molecule. It is used to calculate the amount of energy required to move an ion from one point to the another in a crystal substance.
Madelung constant for Wurtzite is 1.64132 and for Sphalerite is 1.63806. Due to the fact that Wurtzite has a slightly higher Madelung constant that Sphalerite, it tends to be more stable than Sphalerite.
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The molar mass of Cu is 63.5 g/mol. The molar mass of Ag is 107.9 g/mol. What mass, in grams, of Ag is produced from reaction of 31.75 g of Cu?
26.95
107.9
215.91
431.82
The mass in grams of Ag produced from reaction of 31.75g of Cu is 107.9 grams
calculation
Cu+2AgNO3 ---> Cu(NO3)2 + 2Ag
find the moles of Cu that reacted
moles= mass/molar mass
=31.75 g/63.5 g/mol= 0.5 moles
from the equation above the mole ratio of CU:Ag is 1:2 therefore the moles of Ag=0.5 moles x2 = 1 mole
mass of Ag= moles of Ag x molar mass
= 1 mole x107.9g/mol = 107.9 grams