Answer:
A
Explanation:
There are 2 sodium atoms and 1 oxygen atom.
Answer:
50g
Explanation:
At the end of the burning process, the mass of the jar and smoke should be 50g after the candle burning is done.
In most systems, the law of conservation of matter finds expression. According to this law "matter is neither created nor destroyed but atoms are rearranged".
In this kind of system, no matter is allowed to escaped and the starting mass of the reactants compared to that of the product will be the same.
According to the second-order rate constant formula:
K t = 1/[At] - 1/[Ao]
when k is the rate constant = 0.035 (given missing in your question)
and t is the time = 190 sec
Ao is the initial concentration of X = 0.35 m
by substitution:
0.035 * 190 sec = 1/[At] - 1/0.35
∴ [At] = 0.11 m
∴ the concentration after 190 sec = 0.11 m