Answer:
A substance with a high activation energy is expected to have a slow reaction rate.
Answer: energy of infrared radiation=13.75×10^-20J
Energy of ultraviolet radiation=8.5×10^-19J
Energy of xrays=3.7×10^-17J
Explanation:
Energy of radiation= h×c/wavelength
h=6.6×10^-34 Js
c=3×10^8 ms-1
For infrared= 6.6×10-34×3×10^8/1.44×10^-6=13.75×10^-20J
For ultraviolet= 6.6×10^-34 × 3×10^8/233×10^-9=8.5×10^-19J
For xrays= 6.6×10^-34×3×10^-8/5.34×10-9=3.7×10^-17J
The age of the fossil given the present amount of Carbon-14 is given in the equation,
A(t) = A(o)(0.5)^t/h
where A(t) is the current amount, A(o) is the initial amount, t is time and h is the half-life. Substituting the known values to the equation,
A(t) / A(o) = 0.125 = (0.5)^(t/5730)
The value of t from the equation is 17190.
Thus, the age of the fossil is mostly likely to be 17190 years old.
Answer:
38,050,000,000,000 picoliters.
Explanation:
10-5=5, 7.61 x 5=38.05 (38.05L)
every liter is equal to 1000000000000 picoliters, so you go from there and just multiply 1000000000000 by 38.05.