Answer:
Based on the Modern Periodic table, there is an increase in the electropositivity of the atom down the group as well as increases across a period. On comparing the electropositivities of the mentioned oxides central atom, it is seen that Ca is most electropositive followed by Al, Si, C, P, and S is the least electropositive.
With the decrease in the electropositivity, there is an increase in the acidity of the oxides. Thus, the increasing order of the oxides from the least acidic to the most acidic is:
CaO > Al2O3 > SiO2 > CO2 > P2O5 > SO3. Hence, CaO is the least acidic and SO3 is the most acidic.
Answer:
The value is 
Explanation:
Generally the reaction between oxygen and magnesium is
Generally from the law of mass conservation in a chemical reaction we have that
Here 
is the mass of magnesium
is the mass of oxygen
is the mass of magnesium oxide
So
=> 
=>
Answer:
Gas is for example oxygen or the air we breath and liquid is water.
Explanation:
