A 50.0 mL Volumetric flask filled with aqueous solution of hydrogen peroxide has a total mass of 88.5 g. The mass of the volumetric flask is 16.5 g. What is the density of the aqueous solution of hydrogen peroxide ?

1.44 g/mL

Explanation:

From the question given above, the following data were obtained:

Volume (V) of H2O2 = 50 mL.

Mass of flask + H2O2 = 88.5 g.

Mass of flask = 16.5 g.

Density (D) =?

Next, we shall determine the mass of the hydrogen peroxide (H2O2).

This can be obtained as follow:

Mass of flask + H2O2 = 88.5 g.

Mass of flask = 16.5 g.

Mass of H2O2 =?

Mass of H2O2 = (Mass of flask + H2O2) – (Mass of flask)

Mass of H2O2 = 88.5 – 16.5

Mass of H2O2 = 72 g

Finally, we shall determine the density of the hydrogen peroxide (H2O2) as follow:

Volume (V) of H2O2 = 50 mL.

Mass (m) of H2O2 = 72 g.

Density (D) =?

Density (D) = mass (m) /volume (V)

D = m/V

D = 72 g / 50 mL

D = 1.44 g/mL

Therefore, the density of the hydrogen peroxide (H2O2) is 1.44 g/mL.

answer; /// i do believe that the correct answer is (c)nuclear bond

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.