Answer:
a 10,00 year-old coral reef ecosystem
Mass of solute = 25.8 g
mass solution = 212 g
% =( mass of solute / mass solution ) x 100
% = ( 25.8 / 212 ) x 100
% = 0.122 x 100
= 12.2 %
The half-life of the carbon-14 isotope is used in dating fossils in a process called radiocarbon dating.
hope this is adequate.
The new volume : 0.07 L
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Further explanation</h3>
Boyle's Law
At a constant temperature, the gas volume is inversely proportional to the pressure applied

P₁=1 atm
V₁=0.39 L
P₂=5.6 atm

The answer is protons and electrons! Hope this helps :D