Find the number of moles of CO2− 3 produced when 0.207 mol of sodium carbonate dissolved. Answer in units of mol.
1 answer:
Answer : The number of moles of carbonate ion, produced are, 0.207 moles.
Explanation : Given,
Moles of sodium carbonate = 0.207 mol
As we know that when sodium carbonate dissolved in water then it dissociates to give 2 sodium ion and 1 carbonate ion.
The balanced chemical reaction will be:
From the balanced chemical reaction we conclude that,
As, 1 mole of sodium carbonate dissociate to give 1 moles of carbonate ion,
So, 0.207 mole of sodium carbonate dissociate to give 0.207 moles of carbonate ion,
Thus, the number of moles of carbonate ion, produced are, 0.207 moles.
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Answer:
Limiting reagent = lead(II) acetate
Theoretical yield = 1.2704 g
% yield = 78.09 %
Explanation:
Considering:
Or,
Given :
For potassium sulfate :
Molarity = 0.120 M
Volume = 57.0 mL
The conversion of mL to L is shown below:
1 mL = 10⁻³ L
Thus, volume = 57.0×10⁻³ L
Thus, moles of potassium sulfate:
Moles of potassium sulfate = 0.00684 moles
For lead(II) acetate :
Molarity = 0.118 M
Volume = 35.5 mL
The conversion of mL to L is shown below:
1 mL = 10⁻³ L
Thus, volume = 35.5×10⁻³ L
Thus, moles of lead(II) acetate :
Moles of lead(II) acetate = 0.004189 moles
According to the given reaction:
1 mole of potassium sulfate react with 1 mole of lead(II) acetate
0.00684 moles potassium sulfate react with 0.00684 mole of lead(II) acetate
Moles of lead(II) acetate = 0.004189 moles
Limiting reagent is the one which is present in small amount. Thus, lead(II) acetate is limiting reagent. ( 0.004189 < 0.00684)
The formation of the product is governed by the limiting reagent. So,
1 mole of lead(II) acetate gives 1 mole of lead(II) sulfate
0.004189 mole of lead(II) acetate gives 0.004189 mole of lead(II) sulfate
Molar mass of lead(II) sulfate = 303.26 g/mol
Mass of lead(II) sulfate = Moles × Molar mass = 0.004189 × 303.26 g = 1.2704 g
Theoretical yield = 1.2704 g
Given experimental yield = 0.992 g
<u>% yield = (Experimental yield / Theoretical yield) × 100 = (0.992/1.2704 g) × 100 = 78.09 %</u>
Answer:
Glycogen in an important storage polysaccharide found in animal tissues.
Explanation:
Full question:
Glycogen ________
A) forms the regulatory molecules known as enzymes
B) serves as a structural component of human cells
C) helps to protect vital organs from damage
D) is an important storage polysaccharide found in animal tissues
E) contains the genetic information found in cells
Glycogen is a complex polysaccharide of glucose founded in humans, animals, fungi and even bacteria. In humans, the glycogen is made and stored in liver cells. In the center on glycogen molecule, there is a single protein called Glycogenin. It is a center of a big flower made of glucose molecules (please refer to the scheme attached - Glycogenin is red and the blue lines are glucose chains). Glycogen is also stored in skeletal muscle, red and white blood cells, in glial brain cells and kidneys but in a smaller amounts. It can be found in the placenta in pregnant women where it serves as a nutrient storage for embryo. In an adult, the liver weighs 1,5 kg and glycogen weighs about 120g in such a liver. After a meal, the level of sugar is rising and the insulin is being secreted. Insulin is a tool by which sugar is being delivered to the cells, like a food delivery. During this period, glycogen is being synthesized in the liver out of glucose residues. When the meal is digested, the sugar level is back to normal. When more energy is needed, glycogen from the liver is broken down by glycogen phosphorylase and the new sugar is released into the bloodstream.
