D. 2Na (s) + MgF2 → 2NaF (s) + Mg (s)
Explanation:
From the given choices, 2Na (s) + MgF2 → 2NaF (s) + Mg (s) is balanced
A balanced equation is one that obeys the law of conservation of matter which states that "matter is neither created nor destroyed but transformed from one form to another".
We expect to find the same name of atoms on both sides of the equation.
let us examine the choices;
Zn (s) + HCl (g) → ZnCl2 (s) + H2 (g)
Reactants Products
Zn 1 1
H 1 2
Cl 1 2
Na (s) + O2 (g) → Na2O
Reactants products
Na 1 2
O 2 1
Na (s) + MgF2 → 2NaF (s) + Mg (s)
Reactants products
Na 1 2
Mg 1 1
F 2 2
2Na (s) + MgF2 → 2NaF (s) + Mg (s)
Reactants products
Na 2 2
Mg 1 1
F 2 2
learn more:
Balanced equation brainly.com/question/2947744
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Answer:
the SI unir of enery is joule
Easy ! EVERY element and every compound melts, then boils and becomes a gas, if you heat it to a high enough temperature. That includes iron, gold, water, salt, glass, almost any substance.
