Answer:
Hydrogen is a substance because it has mass and combined with other molecules it can make another substance such as water.
Explanation:
Volume of Acetone = 28.56ml
Mass in grams = ?
For the density of Acetone which has Propanone in IUPAC names,
we will find that density is 0.7925g/cm3. This is the same as 0.7925g/ml.
Now by using the formula
Density = Mass / Volume
Mass = Density x Volume
Putting the values of density and volume in formula,
Mass = 0.7925g/ml x 28.56ml
<span>Mass = 22.63g </span>
<span>so the mass is 22.63g </span>
The chemical nature of Q sepharose which allows it to be used as an ion exchanger include the following: It is an insoluble matrix which is in form of micro beads. The bead are porous, which provides a large surface area within and outside them. This properties make it possible for Q sepharose to finely separate different organic molecules.<span />
The two atoms shown in the equation are CALCIUM and oxygen.
<span>You start off with a neutral calcium atom with a shell of two electrons, a shell of 8 around that, a shell of 8 around that, and a shell containing 2...with no charge. </span>
<span>20 protons + 20 electrons. </span>
<span>You also have an oxygen atom with a shell of 2, and a shell of 6...with no charge. </span>
<span>8 protons + 8 electrons. </span>
<span>Each ionizes to form a calcium ion with 2 electrons removed (from the outer shell), leaving a +2 charge (20 protons, 18 electrons)... </span>
<span>and an oxygen ion with 2 electrons added (to the outer shell), leaving a -2 charge (8 protons, 10 electrons). </span>
<span>Their electrostatic attraction causes them to come together to form an ionic compound of CaO in a crystal lattice.</span>