Answer:
Explanation:
percentage error = error x 100 / correct value
= (2.73 - 2.70) x100 / 2.70
= 1.11 %
The element is Aluminium whose density is 2.702 grams / cc
Boiling point of Aluminium = 2519⁰C .
After a chemical change, the substance always changes. It's only after a physical change that the substance does not change. Hope I helped :)
Answer:
Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes. The mass number is a count of the total number of protons and neutrons in an atom's nucleus.
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.
Answer:
[OH-] = 10^-4 M
Explanation:
pOH= 14- pH= 14-10=4
[OH-]= antilog (-4)= 10^-4M
