Answer:
a. 1
Explanation:
As you know the group 1A elements are also called the Alkali metals and are highly reactive metals because they have only one electron in their valence shell, this means that all prior levels are full and stable, and they have only one electron in the upper level of the valence shell and it is ready to react with any element that is close to it.
Answer:directly proportional to the pressure of the gas above the liquid
Explanation:
b. When multiplying, the answer is determined by the number of significant figures
c. When adding, the answer is determined by the number of decimal places
d. When dividing, the answer is determined by the number of decimal places
e. The number 50,004 has five significant figures
Reacting with air is a chemical property because here two substances are reacting and changing their atoms and appearance, which can not be unchanged.
Chemical properties are those property properties of a substance that does not depend on the quantity of that substance.
For example, a magnet with a small amount of magnet has the same magnetic property and a large amount of magnet has the same magnetic property. The magnetic property of the magnet does not change with the amount of substance.
Air contains many gases, and substances when exposed to air, react with it and change their appearance and chemical appearance, this is a chemical change.
Thus, because two substances are here reacting and changing their atoms and appearance, which cannot be unmodified, reacting with air is a chemical attribute.
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Answer:
Ksp = [La3+]2[CO32–]3.
Explanation:
and reactants are equal.
B. The rate of the forward reaction equals the rate of the reverse reaction and the
concentrations of products and reactants are equal.
C. The rates of the forward and reverse reactions are zero and the concentrations of products
and reactants are constant.
D. The rate of the forward reaction equals the rate of the reverse reaction and the
concentrations of products and reactants are constant.
The best statement which describes a reaction in a state of equilibrium is letter D. The rate of the forward reaction equals the rate of the reverse reaction and the concentrations of products and reactants are constant.
>Chemical equilibrium is defined as the state in which both reactants and products are present in concentrations which have no further tendency to change with time. This state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s).
b. An atom must be identical in size.
c. An atom must be similar in size.
d. The substituting atom must be from the same period. E) The substituting atom must be from the same group.
The correct answer is options c and e.
A solid solution is basically a multi-component framework that comprises a mixture of two or more elements exhibiting a similar crystal lattice. The examples of solid solutions are alloys.
The requirements for one kind of atom to substitute for another in a solid solution are:
1. The size of the atom must be similar.
2. The substituting atom must be from a similar group.
Answer:
An atom must be similar in size.
The substituting atom must be from the same group.
Explanation:
A solid solution is a solid mixture containing a minor component uniformly distributed within the crystal lattice of another component called the major component. Metal alloys are typical examples of a solid solution.
Note that only atoms of similar size can substitute each other in a solid solution. Usually atoms of elements in the same group have atomic sizes that vary within narrow ranges. Hence atoms of elements in the same group have similar atomic sizes and can substitute each other in a solid solution.