Density is the ratio of a sample's mass to its volume. A bar of lead has a mass of 115.2 g. When it is submerged in 25.0 mL of water in a graduated cylinder, the water level rises to 35.5 mL. What is the density of the lead

Explanation:

Given :

Mass of a bar of lead = 115.2 g

Initial water level = 25 mL

Final water level = 35.5 mL

Difference in the water level = 35.5 - 25

                                               = 10.5 mL

                                               =

We know that when a body is submerged in water, it displaces its own volume of water.

Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL  =

We know that mathematically, density is the ratio of mass of body to its volume.

Density of the lead bar is given by :

  =

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

b.

the accuracy of the data.