Alloys are materials that contain more than one element and it has the characteristics properties of metals- they are ductile, malleable and good electrical conductor.
Alloys can be of a heterogeneous mixture. This means that its component materials are not uniformly distributed. No matter how structured the alloy is, when you combine a metal with another metal, it would change its properties. Taken for example, bronze which is the first substitutional alloy, which was used more than 3000 years BCE. Bronze is composed of 70 to 90 percent of copper that is mixed with tin. The resulting alloy has better qualities that are increased in durability, easier melting, and casting and it's much stronger, harder and more resistant to corrosion than pure metals.
Metallic bonding, however, is a type of chemical bonding that arises with electrostatic force between conduction electrons and a positively charged metal ions. To understand why alloys are much stronger than pure metals, it must be taken into consideration that metals are crystalline solids. When a metal is mixed with another metal to produce a substitutional alloy, the less abundant atoms of the solute element disrupts the crystal lattices of the more abundant element. This makes it harder for planes of the material to slide past each other, which makes the alloy hard and strong.
Biodiversity helps an economy grow and develop over time because such as the circle of life we need other things in order to evolve such as trees so we can be able to breathe and plants so the herbivores can eat so we can eat them because we are all part of a cycle and in order to keep the cycle going we need biodiversity to keep the food chain going and our economy well and lifted
Answer:
Solution is 4.67% by mass of salt
Explanation:
% by mass is the concentration that defines the mass of solute in 100g of solution.
In this case we have to find out the mass of solution with the data given:
Mass of solution = Mass of solute + Mass of solvent
Solute: Salt → 14.2 g
Solvent: Water → 290 g
Solution's mass = 14.2 g + 290g = 304.2 g
% by mass = (mass of solute / mass of solution) . 100
(14.2 g / 304.2g) . 100 = 4.67 %
Sodium
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Answer: The formic acid is 3.5 times stronger than acetic acid.
Explanation:
The strength of an acid depends on its acid dissociation constant.
For a hypothetical monoprotic acid HA, the dissociation equilibrium is:
More is the value of , greater is the dissociation and stronger is the acid.
Thus formic acid is 3.5 times stronger than acetic acid.