There’s no question for me to answer ?
Answer:
BHx, x=3
CHx, x=4
NHx, x=3
CH2Clx, x=2
Explanation:
We have to know that the value of x must depend on the valency of the central atom. If we look at each of the species;
Boron has a common valency of 3
Carbon has a common valency of 4
Nitrogen has a common valency of 3
The valency of each elements will determine the most likely value of x as outlined in the answer above.
Answer:
5.51mol/L
Explanation:
Number of moles = 1.35moles
Volume of the solution = 245mL = 245*10^-3L = 0.245L
Molarity of a solution is the defined as the number of moles of a solute dissolved in 1L of the solution.
1.35 moles = 0.245L
X moles = 1L
X = (1.35 * 1) / 0.245
X = 5.51mol/L
The molarity of the solution is 5.51mol/L
Answer: The correct answer would be : "A bottle that is sealed".
I hope that this helps you !
Answer:
There will be no reaction between the product of hydrolysis and I2-KI (-ve). When the product of hydrolysis is tested with Benedict reagent, a brick-red precipitate is observed.
Explanation:
Benedict's reagent as a chemical reagent is a mixture of sodium carbonate, sodium citrate and copper(II) sulfate pentahydrate. It is often used in place of Fehling's solution to detect the presence of reducing sugars. A positive test with Benedict's reagent is shown by a color change from clear blue to a brick-red precipitate.
Glycogen and starch are both complex structures containing repeating units of glucose(a reducing sugar). The polysaccharides have non redusing ends and so cannot react with benedict reagent.
When they are hydrolysed, glucose which is a reducing sugar can then test positive with Benedict reagent.
