Уравнение реакции:
2CO2 + Ca(OH)2 = Ca(HCO3)2
Из условия m(Ca(HCO3)2) = 8,1 г. Найдем количество вещества гидрокарбоната кальция:
n(Ca(HCO3)2) = m(Ca(HCO3)2)/M(Ca(HCO3)2) = 8,1/162 = 0,05 моль.
В уравнении реакции перед CO2 стоит коэффициент 2, а перед Ca(HCO3)2 — 1. Поэтому количество вещества CO2 через количество вещества Ca(HCO3)2 можно выразить следующим образом:
n(CO2) = n(Ca(HCO3)2) ⋅ 2/1 = 0,05 ⋅ 2 = 0,1 моль,
Следовательно:
V(CO2) = n(CO2) ⋅ Vm = 0,1 ⋅ 22,4 = 2,24 л
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Объяснение:
In the 19th century, football in England gained a popularity comparable to cricket [15]. It was played mainly in colleges [16]. In some colleges, the rules allowed dribbling and passing the ball by hand, in others it, on the contrary, was prohibited. [17] The first attempt to create uniform rules was made in 1846, when representatives of several colleges met. They established the first set of rules [18]. The first specialized football club was founded in 1857
Sheffield [19]. In 1863, after lengthy negotiations, a set of rules for the Football Association of England was adopted. The sizes of the field and the goal were also adopted [20]. And in 1871, the FA Cup was founded - the oldest football tournament in the world [21]. In 1891, the penalty rule was adopted. But at first, the penalty was fired not from the point, but from the line, which, like now, was at a distance of 11 meters from the goal [22]. According to the Rules, the mandatory elements of equipment are: a shirt (or T-shirt) with sleeves, shorts, leggings, shin guards and boots
Ca(OH)2 + 2CO2 = Ca(HCO3)2
Рассчитать количество вещества гидрокарбоната кальция 8,1г/ 162г/моль= 0,05 моль
Рассчитать количество вещества оксида углерода (4) СО2)= 0,05*2= 0,1 моль
Рассчитать массу объем (СО2) V= Vm*n (количество вещества) V= 0,1 моль * 22,4л/моль= 2,24л