Answer:
The incorrect statement is option B and D.
Explanation:
Carbohydrates are more generally is known as the sugars that are composed of the carbon, hydrogen and oxygen atoms. Monosaccharides are the single unit of carbohydrates while disaccharides are the sugars that contain two molecules of the sugar and similarly saccharides with multiple sugars are called polysaccharides. The general chemical formula of the carbohydrates Cn(H2O)n, however the complex sugars does not follow this formula. Amino sugars are contains NH2 in their formula so carbohydrates not necessarily contains only H, O, AND C always.
Thus, the incorrect answer is - option B and D.
<span>The force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.</span>
Answer is: the HCO3⁻ to act as a base and remove excess H⁺ by the formation of H₂CO₃.
Dissociation of carbonic acid: H₂CO₃(aq) ⇄ HCO₃⁻(aq) + H⁺(aq).
Adding acid: HCO₃⁻(aq) + H⁺(aq ⇄ H₂CO₃(aq).
A buffer can be defined as a substance that prevents the pH of a solution from changing by either releasing or absorbing H⁺ in a solution.
Buffer is a solution that can resist pH change upon the addition of an acidic or basic components and it is able to neutralize small amounts of added acid or base, pH of the solution is relatively stable.
<u>Answer:</u> The total vapor pressure of the solution is 81.3 mmHg
<u>Explanation:</u>
To calculate the total pressure, we use the equation given by Dalton and Raoults, which is:
where,
= total vapor pressure
We are given:
Mole fraction of benzene = 0.580
Mole fraction of toluene = (1 - 0.580) = 0.420 (Total mole fraction is always equation to 1)
Vapor pressure of benzene = 183 mmHg
Vapor pressure of toluene = 59.2 mmHg
Putting values in above equation, we get:
Hence, the total vapor pressure of the solution is 81.3 mmHg