A22.4g sample of a substance was added to a graduated cylinder. it caused an 18.3 ml change in the volume of the water in the cylinder. what is the density of the substance?

              Density  =  1.22 g.mL⁻¹

Data Given:

                  Mass  =  22.4 g

                  Volume  =  18.3 mL

                  Density  =  ??

Formula used;

                 Density  =  Mass ÷ Volume

Putting values,

                 Density  =  22.4 g ÷ 18.3 mL

                Density  =  1.22 g.mL⁻¹

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72