Zadanie 12
Which functional groups are present in this molecule? A. halogeno, carboxyl, hydroxyl B. halogeno, carbonyl, hydroxyl C. halogeno, carbonyl, alkoxy D. halogeno, ester, hydroxyl
- 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.
Baza zadań
Wybierz umiejętność, rok lub poziom trudności. Każde zadanie ma klucz i schemat punktowania.
Pokazujemy tylko poziomy, dla których mamy zadania.
Znaleziono 1061 zadań
Which functional groups are present in this molecule? A. halogeno, carboxyl, hydroxyl B. halogeno, carbonyl, hydroxyl C. halogeno, carbonyl, alkoxy D. halogeno, ester, hydroxyl
Element 117, tennessine, was first synthesized in 2010. In which block of the periodic table is it placed? A. s B. p C. d D. f
Which is a correct alternative representation of the molecule shown? A. C5H11Br B. 3-bromo-2-methylbut-1-ene C. CH2=CHC(CH3)2Br D. CH3CH=C(CH3)CH2Br
The periodic table is divided into the s, p, d and f blocks. Which characteristic of an element determines the block in which it is placed? A. the number of protons in its nucleus B. the sublevel occupied by its highest-energy electrons C. the number of main…
The enthalpy change of a reaction is ΔH = +58 kJ mol−1. Which statement about this reaction is correct? A. The reaction is endothermic and the products are less stable than the reactants. B. The reaction is endothermic and the products…
For which reactions can the enthalpy change be calculated using only average bond enthalpy data? I. N2(g) + O2(g) → 2 NO(g) II. C2H4(g) + H2(g) → C2H6(g) III. 2 H2O2(l) → 2 H2O(l) + O2(g) A. I and II only B. I and III only C. II and III…
Which energy source is renewable? A. natural gas B. biodiesel made from vegetable oil C. petrol (gasoline) refined from crude oil D. uranium
Ammonia is oxidized according to the equation below. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) What is the amount, in mol, of H2O produced when 8.00 mol of NH3 reacts with 5.00 mol of O2, if the yield is 80 %? A. 4.80 B. 6.00 C. 9.60 D.…
When 10.0 cm3 of a gaseous hydrocarbon, CxHy, is burned completely, 70.0 cm3 of gaseous products is formed. This volume falls to 30.0 cm3 when the water vapour condenses. All volumes are measured at the same…
Propane hydrate, C3H8 ⋅ 17 H2O (Mr = 350), is a crystalline solid that can form in natural gas pipelines at low temperature. What mass of carbon dioxide is produced by the complete combustion of 17.5 g of propane hydrate? A. 2.20 g B. 6.60 g C. 17.5 g…