Zadanie 26
Which set of formulas is a homologous series? A. CH4, C2H4, C3H4 B. C2H6, C3H6, C4H6 C. C3H8, C3H6, C3H4 D. C2H4, C3H6, C4H8
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Which set of formulas is a homologous series? A. CH4, C2H4, C3H4 B. C2H6, C3H6, C4H6 C. C3H8, C3H6, C3H4 D. C2H4, C3H6, C4H8
What is the main organic product when 1-bromopropane is heated with aqueous sodium hydroxide solution? A. propene B. propan-1-ol C. propanal D. propane
Which pair of reaction mechanisms is typical of the reaction of an alkene with bromine and of the reaction of bromoethane with aqueous sodium hydroxide, respectively? A. Electrophilic addition and electrophilic addition B. Electrophilic addition and…
A student determines the molar volume of a gas at STP in an experiment and obtains 21.2 dm3 mol−1. The value in the data booklet is 22.7 dm3 mol−1. What is the percentage error of the student's result? A. 1.5 % B. 6.61 % C.…
The diagram shows part of the scale on a glass tube used to measure the volume of a liquid. The labelled marks are in cm3. What is the uncertainty, in cm3, of a reading taken with this scale? A. ±0.01 B. ±0.05 C. ±0.1 D. ±0.2
A solution of barium hydroxide of concentration 0.10 mol dm−3 was added dropwise to 25 cm3 of copper(II) sulfate solution of concentration 0.10 mol dm−3 until 25 cm3 of the barium hydroxide solution had…
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.
Ammonium carbonate, (NH4)2CO3, is another ammonium salt; it is used in smelling salts and as a raising agent in baking. Deduce the Lewis (electron dot) structure of the carbonate ion, CO32−.