Increases must be the right answer
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.
![2Mg(s) + O_{2}(g) \rightarrow 2MgO(s)](https://tex.z-dn.net/?f=2Mg%28s%29%20%2B%20O_%7B2%7D%28g%29%20%5Crightarrow%202MgO%28s%29)
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.
Answer:
Mass = 1080.26 g
Explanation:
Given data:
Number of moles of LaPO₄ = 4.56mol
Mass in gram = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of LaPO₄ = 236.9 g/mol
by putting values,
4.56 mol = mass/ 236.9 g/mol
Mass = 4.56 mol × 236.9 g/mol
Mass = 1080.26 g
Answer:
3.98g
Explanation:
Given parameters:
Number of molecules = 1.2 x 10²⁴ molecules
Unknown:
Mass of H₂ = ?
Solution:
To find the mass of this molecule, we use the expression below:
Mass = number of moles x molar mass
Molar mass of H₂ = 2(1) = 2g/mol
6.02 x 10²³ molecules are contained in 1 mole of a substance
So; 1.2 x 10²⁴ molecules will have
= 1.99 moles of H₂
Mass of H₂ = 1.99 x 2 = 3.98g