Question

Найдите массу, количество вещества, объём вещества C6H6. Если известно, что число частиц 6,02*10^22, молярная масса 78 г/моль, плотность 0,8 г/см3.

Answer 1

Дано:
N(C6H6)=6,02*10^22
Mr(C6H6)=78 г/моль
 ρ(С6H6)=0,8 г/см3
Найти:
m(C6H6)-?
n(C6H6)-?
V(C6H6)-?
Решение:
n=N:Na
n(C6H6)=6,02*10^22 : 6,02*10^23=0,1 моль
m=n*Mr
m(C6H6)=0,1моль*78г/моль=7,8г
V=m:ρ
V(C6H6)=7,8 г :0,8 г/см3=9,75 см3
или
V=n*Vm
V(C6H6)=0,1 моль*22,4л/моль=2,24л

Answer 2

Calculation of Mass, Amount of Substance, and Volume of C6H6

To calculate the mass, amount of substance, and volume of C6H6 (benzene), we can use the given information:

- Number of particles: 6.02 * 10^22 - Molar mass: 78 g/mol - Density: 0.8 g/cm^3

Let's calculate each parameter step by step:

# Mass of C6H6:

The mass of C6H6 can be calculated using the formula:

Mass = Amount of Substance * Molar Mass

Given that the molar mass of C6H6 is 78 g/mol, we can substitute the values into the formula:

Mass = 6.02 * 10^22 * 78 g/mol

Calculating this, we find:

Mass = 4.69 * 10^24 g

# Amount of Substance of C6H6:

The amount of substance of C6H6 can be calculated using the formula:

Amount of Substance = Mass / Molar Mass

Substituting the values into the formula, we get:

Amount of Substance = 4.69 * 10^24 g / 78 g/mol

Calculating this, we find:

Amount of Substance = 6.01 * 10^22 mol

# Volume of C6H6:

The volume of C6H6 can be calculated using the formula:

Volume = Mass / Density

Substituting the values into the formula, we get:

Volume = 4.69 * 10^24 g / 0.8 g/cm^3

Calculating this, we find:

Volume = 5.86 * 10^24 cm^3

Please note that the given density is in grams per cubic centimeter (g/cm^3), so the volume is in cubic centimeters (cm^3).

Therefore, the mass of C6H6 is 4.69 * 10^24 grams, the amount of substance is 6.01 * 10^22 moles, and the volume is 5.86 * 10^24 cubic centimeters.