When the equation is correctly balanced, the coefficient of aluminum chloride will be ___.
1 answer:
The answer for the following question is answered below.
<em>Therefore when the equation is balanced the co-efficient of aluminium chloride will be 2.</em>
Explanation:
The balanced equation for the following equation is:
+
→
+
To balance an equation:
- Firstly we have to see whether the elements on the reactants and products side are same or not.
- Then balance each element and see whether the equation is balanced or not
<em>When 2 moles of aluminium chloride react with 3 moles of barium hydroxide on the reactants side then on the products side it yields 2 moles of aluminium hydroxide and 3 moles of barium chloride </em>
(i.e.)
2 + 3
→ 2
+ 3
<em><u>Therefore when the equation is balanced the co-efficient of aluminium chloride will be 2.</u></em>
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Answer:
Elemental gold to have a Face-centered cubic structure.
Explanation:
From the information given:
Radius of gold = 144 pm
Its density = 19.32 g/cm³
Assuming the structure is a face-centered cubic structure, we can determine the density of the crystal by using the following:
a = 407 pm
In a unit cell, Volume (V) = a³
V = (407 pm)³
V = 6.74 × 10⁷ pm³
V = 6.74 × 10⁻²³ cm³
Recall that:
Net no. of an atom in an FCC unit cell = 4
Thus;
density d = 19.41 g/cm³
Similarly; For a body-centered cubic structure
where;
r = 144
a = 332.56 pm
In a unit cell, Volume V = a³
V = (332.56 pm)³
V = 3.68 × 10⁷ pm³
V 3.68 × 10⁻²³ cm³
Recall that:
Net no. of atoms in BCC cell = 2
∴
density =17.78 g/cm³
From the two calculate densities, we will realize that the density in the face-centered cubic structure is closer to the given density.
This makes the elemental gold to have a Face-centered cubic structure.