The correct answer is D 4.29x10^24
Explanation:
A balanced chemical equation is the one that has same number of atoms present on both reactant and product side.
The balanced chemical reaction equation will be as follows.
According to law of conservation of mass, mass can neither be created nor it can be destroyed. It can only be transformed from one form to another.
Hence, total mass of reactant species in the above equation is 112.6 g. Hence, total mass of products is also 112.6 g.
Also, in this reaction Mg is present in solid state, is present in gaseous state, and MgO is present in solid state.
The answer is B. It has 8 protons
Answer:
False
True
True
False
False
True
Explanation:
Ideal behavior of gases is observed at high temperature and low pressure when the gas molecules are isolated from each other.
According to the kinetic theory of gases, gases occupy negligible volume and do not exert significant attractive forces on each other.
The average velocity of gases at constant temperature depends on molecular mass. Heavier molecules possess smaller average velocity than lighter molecules at constant temperature.
At constant temperature, molecules of different gases have the same average kinetic energy but different average velocities since they have different molecular masses. So, the average kinetic energy of gas molecules only depends on temperature.