Merits and demerits of Mendeleev's periodic table in points and explain each of them in short.(write in the easiest way you can and don't copy)​

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %

Some molecular compounds, such as hcl, ionize completely in solution. for molecular compounds such as h2co3, most molecules do not ionize in solution. which describes the properties of these two solutes? a. hcl and h2co3 have the same effect on the properties of the solution. b. hcl raises the freezing point of water more than h2co3 does. c. hcl raises the boiling point of water more than h2co3 does.

Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating