Answer:
B
Explanation:
because B has a lower bp it needs less time and energy to turn into vapour and is collected into the condenser first
Two electrons because it is in second group.
The atoms or molecules attain enough kinetic energy to overcome any intermolecular attractions they have. Since there are no longer any attractive forces between the particles, they are free to drift away into space. The same sort of thing hapens in ordinary evaporation, but only at the surface.
C it is C because a geno type is the genetic material that predicts what that feature will look like. A phenotype is how that genotype made you look on the outside.
Answer:Heat released in kilo Joule per gram of benzene when reacted with oxygen is 0.628 kJ/g.
Explanation:
The standard enthalpy of formation of benzene is 49.04 kJ/mol. Same amount of energy will be released on combustion of 1 mol of benzene.
![2C_6H_6+8O_2\rightarrow 6CO_2+4H_2O,\Delta H=-49.04kJ/mol](https://tex.z-dn.net/?f=2C_6H_6%2B8O_2%5Crightarrow%206CO_2%2B4H_2O%2C%5CDelta%20H%3D-49.04kJ%2Fmol)
Mass of 1 mol of benzene = 78 g
1 mole of benzene on combustion gives = 49.04 kJ
78 g of benzene on combustion gives = 49.04 kJ
1 g of benzene on combustion will give = ![\frac{49.04 kJ}{78 g}=0.628 kJ](https://tex.z-dn.net/?f=%5Cfrac%7B49.04%20kJ%7D%7B78%20g%7D%3D0.628%20kJ)
Heat released in kilo Joule per gram of benzene when reacted with oxygen is 0.628 kJ/g.