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3 years ago

Why are alloys useful?

Chemistry

2 answers:

zalisa [80]3 years ago

7 0

Answer:

Explanation:

People make and use alloys because metals don't have exactly the right properties for a job. usually, alloys are stronger and harder than their main metals, harder to work and less ductile (harder to pull into wires).

MrMuchimi3 years ago

7 0

Answer:

The correct answer is to create new materials with very different properties.

Explanation:

An alloy is a homogeneous mixture of two or more elements, one of which is a metal. The resulting compound has very different properties from those of the elements that formed it separately. The mixture of a small quantity of one of them with another one can already modify the properties of the one that is in greater quantity. The alloy technique is used to improve the mechanical strength, hardness or corrosion resistance of pure metals.

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velikii [3]

When in water, MgCl2 dissociates into magnesium ions and Cl- ions and NaOH into Na and OH ions. The equation is as follows:

MgCl2 = Mg2+ + 2Cl-
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Answer:

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Explanation:

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3 years ago

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If 15.0 mL of phosphoric acid completely neutralizes 38.5 mL of 0.150 mol/L calcium hydroxide, what is the concentration of the

Sedbober [7]

Answer:

Let me give it a try.

H3PO4 + Ca(OH)2 = Ca3(PO4)2 + H2O

Balancing this reaction

2H3PO4 + 3Ca(OH)2 == Ca3(PO4)2 + 6H2O.

Moles= Molarity x Volume

Volume = 38.5ml = 0.0385L

Moles of Ca hydroxide = 0.150m/L x 0.0385L

(Notice the units canceling out...leaving moles).

=0.005775moles of Ca(OH)2.

From balanced reaction...

3moles of Ca(OH)2 completely reacts with 2moles of H3PO4

0.005775moles of Ca(OH)2 would completely react with....

= 0.005775 x 2/(3)

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Now we're looking for its Concentration in Mol/L

Molarity=Moles of solute/Volume of solution(in L)

Volume of solution assuming no other additions to the reaction = 15ml + 38.5ml =53.5ml =0.0535L

Molarity = 0.00385/0.0535

=0.072Mol/L.

If this is wrong

then Simply Try The formula for Mixing of solutions

C1V1 = C2V2

0.15 x 38.5 = C2 x (15+38.5)

C2 = 0.11M/L.

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yulyashka [42]

Answer:

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