Question

Какое количество вещества составляют 11,2 литра кислорода?

Answer 1

Основная формула в химии:
n = m/M = N/Na = V/Vm

Отсюда: 
n (О₂) = V (О₂) / Vm  ⇒
n (O₂) = 11,2 л / 22,4 л/моль = 0,5 моль

Ответ: n (O₂) = 0,5 моль

Answer 2

Amount of Substance in 11.2 Liters of Oxygen

The amount of substance in 11.2 liters of oxygen can be calculated using the ideal gas law, which states that the amount of substance (in moles) can be calculated using the formula:

n = PV / RT

Where: - n = amount of substance (in moles) - P = pressure (in atmospheres) - V = volume (in liters) - R = ideal gas constant (0.0821 L·atm/(K·mol)) - T = temperature (in Kelvin)

Given that the temperature and pressure are not provided, we can assume standard temperature and pressure (STP) for this calculation, which is 0°C (273.15 K) and 1 atmosphere.

Using this information, we can calculate the amount of substance in 11.2 liters of oxygen.

The molar volume of a gas at STP is approximately 22.4 liters per mole. Therefore, the amount of substance in 11.2 liters of oxygen can be calculated as:

n = V / 22.4

Substituting the given volume:

n = 11.2 / 22.4

n = 0.5 moles

So, 11.2 liters of oxygen contain 0.5 moles of oxygen.