The concentration is 5 g/L.
Concentration = mass/volume = 10 g/2 L = 5 g/L
Thermal energy transfers in a solid state, due to convection, in metalic substances.
This is because the covalent bonds between the atoms are being broken and reformed again while the metal is experiencing stress. <em>covalent bonds store energy. </em>
The separation of molecules. I wouldn't put that if i were you.
The answer would be 5. because the last zero is a holding place because the number is in front of the decimal. They other zero counts because they are being sandwiched.<span />