Molar mass C₆H₈O₆ = 176.12 g/mol
1 mole ------------------ 176.12 g
2.88x10⁻⁴ mole ------- ?
mass = 2.88x10⁻⁴ * 176.12 / 1
mass ≈ 0.05072 g
hope this helps!
Physical property because going from a liquid to a gas doesn't change it's chemical composition only it's physical state
Answer:

Explanation:
Hello,
In this case, the by mass percent is computed as shown below:

Whereas the solute is the sugar and the solvent the water, therefore, the concentration results:

Best regards.
Answer:
Al+3
Explanation:
Ion is a positively or negatively charged species. A neutral species does not carry any charge.
here only Al has +3 charge. So it is an ion.