Question

Вычислите массу сгоревшего угля если при его сгорании выделилось 448 литров ( н.у. ) углекислого газа

Answer 1

Решение данной задачи в фото ниже

Answer 2

Находим количество углекислого газа 448/22,4=20 моль
переходим в углю.Они в сооношении 1:1. Значит угля тоже 20 молей. Массу находим по формуле атомная масса * на кол-во.Т.е 20*12=240 гр.
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Answer 3

Calculating the Mass of Burned Coal

To calculate the mass of burned coal, we can use the information provided about the volume of carbon dioxide produced during its combustion. The volume of carbon dioxide produced is 448 liters at standard temperature and pressure (n.у.).

The molar volume of any gas at standard temperature and pressure (STP) is 22.4 liters. Using this information, we can calculate the number of moles of carbon dioxide produced during the combustion of the coal.

Step 1: Calculate the number of moles of carbon dioxide produced The number of moles of carbon dioxide can be calculated using the formula: \[ \text{moles} = \frac{\text{volume (in liters)}}{\text{molar volume at STP (in liters)}} \]

\[ \text{moles} = \frac{448}{22.4} \]

\[ \text{moles} = 20 \]

Step 2: Calculate the mass of burned coal The balanced chemical equation for the combustion of coal can be used to find the mass of the burned coal. The balanced equation is: \[ C + O_2 \rightarrow CO_2 \]

From the balanced equation, we know that 1 mole of carbon reacts with 1 mole of oxygen to produce 1 mole of carbon dioxide.

The molar mass of carbon is 12 g/mol, and the molar mass of carbon dioxide is 44 g/mol.

Using this information, we can calculate the mass of the burned coal.

\[ \text{mass of burned coal} = \text{moles of carbon} \times \text{molar mass of carbon} \]

\[ \text{mass of burned coal} = 20 \times 12 \]

\[ \text{mass of burned coal} = 240 \, \text{grams} \]

Therefore, the mass of the burned coal is 240 grams.