An object with a mass of 7.1 g raises the level of water in a graduated cylinder from 25.1 ml to 32.4 ml. what is the density of the object?

0.9726g/ml

0.9726g/cm³

Explanation:

Density is found by dividing  mass by volume.

Density = mass/volume

mass = 7.1g

volume= the new level of water raised - the initial level of water

volume  = 32.4 - 25.1

volume = 7.3 ml

Volume is the amount of space occupied by an object.meaning the amount of volume displaced by the object is its volume.

density = 7.1 /7.3

density = 0.9726g/ml

or 0.9726 g/cm³

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  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-