Zadanie 8a
Determine the identity of the amino acid in spot B by calculating its RF value from the chromatogram.
- Materiał graficzny
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.
Wybierz umiejętność, rok lub poziom trudności.
Pokazujemy tylko poziomy, dla których mamy zadania.
Znaleziono 1476 zadań
Determine the identity of the amino acid in spot B by calculating its RF value from the chromatogram.
Spot X is known to be either glutamine or isoleucine. The structures of the two amino acids are shown. Predict, with reference to the structures, which amino acid is more likely to be in spot X. Use the RF values in the table.
A pale blue solution of [Cu(H2O)6]2+ turns deep blue when aqueous ammonia is added in excess and the complex ion [Cu(NH3)4(H2O)2]2+ forms. Which factor explains the change in colour? A. Charge on the metal ion B. Number of d electrons in the…
Explain why the lattice enthalpy of potassium bromide, KBr, is lower than that of sodium bromide, NaBr.
Nickel forms the chloride NiCl2. (i) State the full electron configuration of the nickel(II) ion, Ni2+. (ii) In aqueous solution nickel(II) ions exist as [Ni(H2O)6]2+, which is green. Describe the interaction between the nickel ion and a…
Four solids, P, Q, R and S, were tested. The results are shown in the table. Which solid most likely has an ionic lattice structure? A. P B. Q C. R D. S
A colorimeter is set to a wavelength of 550 nm. Explain why it cannot be used to follow reactions of compounds of Sc3+. Use section 5 of the data booklet.
Bromine radicals form when the bond in a bromine molecule is broken by ultraviolet light. The energy needed to break the bond in one molecule of Br2 is 3.21 × 10−19 J. (i) Calculate the minimum frequency of light needed to break this…
Which molecule contains a central atom with fewer than eight electrons in its valence shell? A. NCl3 B. SCl2 C. CS2 D. BeCl2
The initial rate of the iodination of propanone in aqueous acid was measured at constant temperature. CH3COCH3(aq) + I2(aq) → CH3COCH2I(aq) + HI(aq) Four experiments were carried out and the results are given in the table. Deduce the overall rate…