Answer:
Q1. a) 4Al + 3O₂ ➟ 2Al₂O₃
b) 7.4 moles
c) 11.1 moles
Explanation:
To balance an equation, ensure that the total number of atoms of each element on both sides are equal.
Al + O₂ ➟ Al₂O₃
On the left side of the arrow, you would find the reactants while the product(s) is found on the left hand side.
<u>Reactants</u>
Al atoms: 1
O atoms: 2
<u>Product</u>
Al atoms: 2
O atoms: 3
After balancing,
4Al + 3O₂ ➟ 2Al₂O₃
We have 4 Al atoms and 6 O atoms on both sides.
b) The balanced equation tells us the mole ratio of Al to Al₂O₃.
Al: Al₂O₃
= 4: 2 (÷2 throughout)
= 2: 1
This means that for every 1 mole of Al₂O₃, 2 moles of Al is needed.
Since we need 3.7 moles of Al₂O₃,
number of moles of Al needed
= 2×3.7
= 7.4
c) 4Al + 3O₂ ➟ 2Al₂O₃
For every 4 moles of Al, 3 moles of O are needed.
For each mole of Al,
number of moles of O needed
= 3÷4
= 0.75
For 14.8 moles of Al,
number of moles of O required
= 0.75 ×14.8
= 11.1
Answer:
Hi! It's B - globular cluster
Answer:
Chemical Properties:
Flammability, reacts with oxygen, neutralizes a base
Physical Properties:
Boiling point , colour, mass, a solid or precipitate forms, density
By creating combinations of atoms to form substances.
Explanation:
Atoms are the building unit of cells, that are the building blocks of all things. each factor that exists is comprised of cells of assorted components and compounds, held along by atomic bonds.Everything in the universe is composed of atoms.
Answer : Option B) When the equilibrium constant is large.
Explanation : The expression for an equilibrium constant is expressed as the product of the concentrations of the reaction products in the numerator and the product of the concentrations of the reactants in the denominator.
Each of the concentrations are raised to the power of their respective stoichiometric coefficients in the reaction.
When the equilibrium is large the products are favored over the reactants, as concentration of products are directly proportional to the equilibrium constant.
The expression of equilibrium constant is given by
K =
where K - equilibrium constant;
a - co-efficient of product; and
b - co-efficient of reactant.