Chemistry, 22.06.2021 02:30 graymonky12
Mármore é uma rocha metamórfica originada de calcário exposto a altas temperaturas e pressão de baixa a moderada. Um dos principais componentes é o carbonato de cálcio - . Analisando a reação de decomposição do mármore representada a seguir: CaCO₃(s) → CaO(s) + CO₂(g) Com base nas entalpias de formação, dadas a seguir, calcular a variação da entalpia (ΔH) da reação: CaO(s) = -635,5 Kj/mol CO₂(g) = -394 Kj/mol CaCO₃(s) = - 1207 Kj/mol *
1 ponto
a) + 2236,5 Kj
b) - 177, 5 Kj
c) - 37 Kj
d) + 177, 5 Kj
e) - 2236,5 Kj
Answers: 1
Chemistry, 22.06.2019 19:00
How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next
Answers: 1
Chemistry, 22.06.2019 20:30
We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?
Answers: 3
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