Answer:
The hydroxyl groups in alcohol molecules are responsible for hydrogen bonding between the alcohol molecules. As greater energy is required to overcome these strong intermolecular forces, the melting points and boiling points of alcohols are higher than those of alkanes with a corresponding chain length
The answer is 482.06g . . .
(9.06*10^24)(1mole/6.022*10^23)((MolarMass of CH3OH)/1mole) = 482.0606045g
An endothermic reaction needs energy to proceed, such energy is usually taken from the environment surrounding the reaction. In the typical case this energy is expressed as heat. Heat is an state of atomic activity, that energy is transferred to an ENDOthermic reaction so the initial threshold of reaction is overcome and the final reaction can occur.
Explanation:
First you must calculate the number of moles in this solution, by rearranging the equation. No. Moles (mol) = Molarity (M) x Volume (L) = 0.5 x 2. = 1 mol.
For NaCl, the molar mass is 58.44 g/mol. Now we can use the rearranged equation. Mass (g) = No. Moles (mol) x Molar Mass (g/mol) = 1 x 58.44. = 58.44 g.
Answer:
2.41 x 10²³ particles
Explanation:
Data Given:
no. of moles of KCl = 0.4 mol
no. of particles = ?
Solution:
To find number of particles we use following formula
number of moles = number of particles / Avogadro's number
as we have to find number of particles so rearrange the above equation
no. of particles = no. of moles x Avogadro's number . . . . . . . (1)
Where
Avogadro's number = 6.022 x 10²³ particles per mol
6.022 x 10²³ are number of particles in one mole of a substance. and this quantity is known as Avogadro's number
So,
put values in above equation 1
no. of particles = 0.4 mol x 6.022 x 10²³ (particles/mol)
no. of particles = 2.41 x 10²³ particles
So, 0.4 mol KCl contains 2.41 x 10²³ representative particles