Answer: Its an element or compound that loses (or "donates") an electron to an electron recipient (oxidizing agent) in a redox chemical reaction.
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Answer:
There are 6.022 × 10²³ atoms in one molecule of aluminium
Answer: a) 0.070 moles of oxygen were produced.
b) New pressure due to the oxygen gas is 2.4 atm
Explanation:
According to ideal gas equation:

P = pressure of gas = 2.7 atm
V = Volume of gas = 700 ml = 0.7 L
n = number of moles = ?
R = gas constant =
T =temperature = 329 K


Thus 0.070 moles of oxygen were produced.
When the 700 mL flask cools to a temperature of 293K.




The new pressure due to the oxygen gas is 2.4 atm