Zadanie 40
Which compound produces this mass spectrum? A. Propanoic acid, CH3CH2COOH B. Ethyl methanoate, HCOOCH2CH3 C. Butan-1-ol, CH3CH2CH2CH2OH D. Methyl ethanoate, CH3COOCH3
- Materiał graficzny
Wczytuję zadania…
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
Which compound produces this mass spectrum? A. Propanoic acid, CH3CH2COOH B. Ethyl methanoate, HCOOCH2CH3 C. Butan-1-ol, CH3CH2CH2CH2OH D. Methyl ethanoate, CH3COOCH3
Equimolar samples of the following compounds are dissolved in a solvent that gives no 1H NMR signal. Which compound gives the signal with the greatest area in its 1H NMR spectrum? A. C6H6 B. CH3CH2CH2CH2CH2CH2CH2CH3 C. (CH3)4C D.…
How many oxygen atoms are present in 0.0200 mol of aluminium sulfate, Al2(SO4)3? NA = 6.02 × 1023 mol−1 A. 1.20 × 1022 B. 4.82 × 1022 C. 1.44 × 1023 D. 1.44 × 1024
Calculate the percentage by mass of nitrogen in ammonium chloride. Use section 7 of the data booklet.
State, with a reason, whether the ammonium ion acts as a Brønsted–Lowry acid or base when it reacts with water to form ammonia.
A 0.50 mol dm−3 solution of ammonium chloride is prepared. (i) Calculate the pH of an ammonium chloride solution with [H3O+] = 1.68 × 10−5 mol dm−3. Use section 1 of the data booklet. (ii) Write the equation for the…
A student investigates the dissolution of ammonium chloride in water as the basis of an instant cold pack, in which solid ammonium chloride is kept apart from water by a thin membrane. The enthalpy change when one mole of solid ammonium chloride dissolves in…
Predict, using the given values, the reaction that would take place at the anode and at the cathode during the electrolysis of a dilute aqueous solution of ammonium chloride using graphite electrodes.
Solid ammonium chloride decomposes when heated to form two gases, ammonia and hydrogen chloride. (i) Write the chemical equation for this decomposition. (ii) Calculate the volume of ammonia produced at STP when an 8.00 g sample of ammonium chloride decomposes.…
Iodine crystals placed in a warm flask turn directly into purple vapour without forming a liquid. Which term describes this change of state? A. Boiling B. Evaporation C. Deposition D. Sublimation