A sample of bromine has the following composition by mass: \( {}^{79}Br \) 50.75% \( {}^{81}Br \) 49.25%
Paper Type: paper-2
Q-8FE8A (Set 4)
Bromoethane, \( C_{2}H_{5}Br \), is produced by reacting ethene, \( C_{2}H_{4} \), with hydrogen bromide, HBr. \( C_{2}H_{4}(g)+HBr(g)\rightarrow C_{2}H_{5}Br(l) \)
Q-8FE8A (Set 3)
Phenylethene (styrene) is produced from ethylbenzene in a gas-phase equilibrium. Ethylbenzene, \( C_{8}H_{10}(g)\rightleftharpoons \) Styrene, \( C_{8}H_{8}(g) \) + Hydrogen,
Q-8FE8A
Nitrogen monoxide, \( NO(g) \), is produced in internal combustion and jet engines.
Q-8FE8A (Set 2)
Nitric acid, \( HNO_{3} \), is a strong acid.
Q-F7D10 (Set 5)
Transition elements are known for having multiple oxidation states, forming coloured compounds and acting as catalysts. The existence of variable
Q-F7D10 (Set 3)
Nitrous acid, \( HNO_{2} \), is a weak acid which can be used to make acidic buffers.
Q-F7D10 (Set 4)
Another ester was made following a similar reaction sequence.
Q-F7D10
Phosphorus is an element that is an essential part of the biological molecules involved in both respiration and photosynthesis.
Q-F7D10 (Set 2)
Styrene has the chemical formula \( C_{8}H_{8} \) and can be represented by the following structures. Structure A is the