The answer is Iron(II) Hydrogen Carbonate. It can also be known or referred as Ferrous Hydrogen Carbonate or even Iron(II) Bicarbonate. The known formula for this chemical is Fe(HCO3)2. The Molar Mass of this chemical is known as 177.8787. Here are some chemical reactions that may be equivalent to this chemical: FeCO3 + H2CO3 = Fe(HCO3)2; or Fe(HCO3)2 = FeCO3↓ + CO2 + H2O; or Fe(HCO3)2 + 2HNO3 = Fe(NO3)2 + 2H2O + 2CO2
A scientist who wants to date materials older than 40,000 years would most likely use
Potassium – argon dating or K-AR dating. Potassium-40 is a radioactive isotope
of potassium that decays into argon-40. The half life of potassium-40 is 1.3
billion years far longer than carbon-14.
We shall find the molar mass first.
Ca5(PO4)3(OH) = (40 * 5) + 3 (31 + 4(16)) + 16 + 1 = 200 + 285 + 17 = 485 + 17 = 502.
Percent of Calcium = 200/ 502 * 100 = 39.8%
Percent of Phosphorus = 91/502 * 100 = 18.1%
Percent of Hydrogen = 1/502 * 100 = 0.19%
Percent of Oxygen = 100 - (39.8 + 18.1 + 0.19) = 41.91%
Answer:
B. It becomes plutonium-239.
Explanation:
When uranium - 238 absorbs a neutron, it creates and becomes plutonium - 239 atom.
This is a nuclear fission process in which a radioactive nucleus is bombarded with a neutron:
²³⁸₉₂U + ¹₀n → ²³⁹₉₂Pu
The plutonium produced is not stable and it immediately disintegrates further.