Залача. Найти количество вещества, массу и объем (н.у.): а) 12*102 молекул фтора; 0) 3*102 молекул азота; в) 1,8*1023 молекул хлора;
To find the amount of substance, mass, and volume at standard conditions, we'll use the concepts of the mole, molar mass, and molar volume.
For ideal gases at standard temperature and pressure (STP; 0°C and 1 atm), 1 mole of any gas occupies 22.4 liters (L).
a) \(12 \times 10^2\) molecules of fluorine (\(F_2\)):
Calculate moles: \[ \text{Moles} = \frac{12 \times 10^2}{6.022 \times 10^{23}} \]
Calculate mass:
- Molar mass of \(F_2 = 38 \, \text{g/mol}\). \[ \text{Mass} = \text{Moles} \times 38 \]
Calculate volume: \[ \text{Volume} = \text{Moles} \times 22.4 \]
b) \(3 \times 10^2\) molecules of nitrogen (\(N_2\)):
Calculate moles: \[ \text{Moles} = \frac{3 \times 10^2}{6.022 \times 10^{23}} \]
Calculate mass:
- Molar mass of \(N_2 = 28 \, \text{g/mol}\). \[ \text{Mass} = \text{Moles} \times 28 \]
Calculate volume: \[ \text{Volume} = \text{Moles} \times 22.4 \]
c) \(1.8 \times 10^{23}\) molecules of chlorine (\(Cl_2\)):
Calculate moles: \[ \text{Moles} = \frac{1.8 \times 10^{23}}{6.022 \times 10^{23}} \]
Calculate mass:
- Molar mass of \(Cl_2 = 71 \, \text{g/mol}\). \[ \text{Mass} = \text{Moles} \times 71 \]
Calculate volume: \[ \text{Volume} = \text{Moles} \times 22.4 \]
Plug in the numbers using these formulas to find the answers.
Note on the Image:
The image shows a geometry homework problem on calculating the area of a rhombus on graph paper. This problem is unrelated to the chemistry questions you've asked.
