Answer:
D
Explanation:
We must study the reaction pictured in the question closely before we begin to attempt to answer the question.
Now, the reaction is a free radical reaction. This implies that only one electron is transferred. The transfer of one electron is shown using a half arrow rather than a full arrow. The both species are radicals (odd electron species) and contribute one electron each.
Hence we must show electron movements in both species using a half arrow.
They separate because of different densities.
Answer:
S + 02= S0 - 4 e- → SIV (oxidation); 2 O0 + 4 e- → 2 O-II (reduction)
C + 02= C
Cu0 + H2SO4= CuO + H2SO4 → CuSO4 + H2O
Answer:
6.5
Explanation:
No of moles is the ratio of reacting mass to molar mass
RM - 270.4g
MM - 23+16+1= 40g/mol
270.4/40= 6.76mol
For rock dating, the kinetics used is first-order with the equation
ln(initial conc./final conc.) = kt
First, we determine k, which is the reaction constant. With the given half-life, this means that the final conc. is half of the initial conc. Hence,
ln 2 = k (1.25 x10^7)
k =5.55 x 10^-8
Then we use this to predict the time elapsed.
ln (1/0.25) = (5.55x10^-8)(t)
t = 2.5 x 10^7 or 2.5 billion years
I hope I was able to help you with your question. Have a good day.
