There is 40 g of sugar in a 500 ml bottle of lemon juice
<h3>Further explanation</h3>
The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.
the concentration of sugar in lemon juice :

So for 500 ml juice :

Answer:
<em>Mg </em>(<em>s</em>) + 2<em>HCI2 </em>(<em>aq</em>) → <em>MgCI2 </em>(<em>aq</em>) + <em>H2 </em>(<em>g</em>)
I think this is the correct answer I not a 100% sure if it is correct.
Explanation:
Guessing
Compared to the charge and mass of a proton an electron has......
A proton has approximately the same mass as..........
Both of them have high electronegativity. Hence they both tend to gain electrons to gain stability.