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

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction

Answer explain why it is not possible to deduce a complete order of reactivity.