NEED HELP ASAP! Write a statement explaining your claim about whether or not the equation is correctly balanced.
2 answers:
Evaluating the number of atoms of each element on the product and reactant side, we can conclude that the student's equation isn't balanced.
<u>Given the chemical reaction</u> :
For a balanced equation, the number of atoms of each element in the product side must be equal to that on the reactant side.
<u>Number of hydrogen</u> :
Reactant side = (6 × 2) = 12
Product side = (6 × 2) + (6 × 2) = 12 + 24 = 24
<em>Product side ≠ reactant side</em> ; Hence, the equation isn't balanced
<u>The balanced equation for the reaction goes thus</u> :
<u>Reactant side</u> :
Al = 4
H = (12 × 2) = 24
O = 12
C = 3
<u>Product side</u> :
H = (6 × 2) + (6 × 2) = 12 + 24 = 24
Al = 4
O = 4 × 3 = 12
C = 3
Therefore, the student's equation isn't balanced, the balanced version of the equation has been given .
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Answer:
The attractive force is negative and MgO has a higher melting point
Explanation:
From Couloumb's law:
Energy of interaction, E = k
where q1 and q2 are the charges of the ions, k is Coulomb's constant and r is the distance between both ions, i.e the atomic radii of the ions.
If you look at Coulomb's law, you note that in the force is negative (because q1 is negative while q2 is positive).
In addition to that, the compounds MgO and NaF have similar combined ionic radii, then we can determine the melting point trend from the amount of energy gotten
The melting point of ionic compounds is determined by 1. charge on the ions 2. size of ions. while NaF has smaller charges (+1 and -1), MgO (+2 and -2) has larger charges and greater combined atomic radii. This implies that the compound with greater force would have a higher melting point.
Hence the compound MgO would have a higher melting point than NaF.