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ZanzabumX [31]
3 years ago
15

Which is a characteristic of mixtures

Chemistry
2 answers:
Artyom0805 [142]3 years ago
8 0

Answer:

This question is not complete

Explanation:

Mixture is a combination of two or more substances that are physically combined. This combination cannot be represented by a chemical equation. This combination can also be separated by physical processes such as filtration, evaporation and sedimentation.

Mixtures are generally of two major types; homogeneous and heterogeneous.

Homogeneous mixture is a mixture in which it's constituent particles are evenly distributed in the mixture. Examples are salt solution, sugar solution and air.

Heterogeneous mixture is a mixture in which it's constituent particles are not evenly distributed in the mixture. Examples are sand, oil and water solution e.t.c.

barxatty [35]3 years ago
5 0
They are three types of mixtures:
-solutions : they are homogeneous mixtures of 2 or more sub. in a single phase.
-suspensions: if the particles in a solvent are so large that they settle out unless constantly tired, the mixture is called a suspension.
-colloids: particles that are intermediate in size between those of solutions and suspensions form mixtures called colloids.

:)
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If you begin with 1250 grams of N2 and 225 grams of H2 in the reaction that forms ammonia gas (NH3), how much ammonia will be fo
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N₂+3H₂⇒ 2NH₃
m(NH₃)=1250+225*2=1700 grams
N₂ is the limiting <span>reagent.
1250 grams are</span><span> left when the maximum amount of ammonia is formed.</span>
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3 years ago
A 65.0-gram sample of some unknown metal at 100.0° C is added to 100.8 grams of water at 22.0° C. The temperature of the water r
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We do a heat balance to solve this:
(m cp ΔT)water = -(m cp ΔT)metal
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The measurement of grams of solute per one million grams of solution is known as
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Refusing to take part in sexual activity is called sexual abstinence? True or false.
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Read 2 more answers
g On the basis of their respective pKa values, determine which is the stronger acid, acetic acid (pKa 5 4.7) or benzoic acid (ma
ozzi

Answer:

Benzoic acid is the stronger acid

Explanation:

Weak acids do not dissociate completely in the solution. They exists in equilibrium with their respective ions in the solution.

The extent of dissociation of the acid furnising hydrogen ions can be determined by using dissociation constant of acid (K_a).

Thus for a weak acid, HA

HA \rightleftharpoons A^- + H^+

The K_a is:

K_a= \frac{[A^-][H^+]}{[HA]}

The more the K_a, the more the acid dissociates, the more the stronger is the acid.

Also,

pK_a is defined as the negative logarithm of K_a.

So, more the pK_a, less is the K_a and vice versa

All can be summed up as:

The less the value of pK_a, the more the  K_a is and the more the acid dissociates and the more the stronger is the acid.

Given,

pK_a of acetic acid = 54.7

pK_a of benzoic acid = 54.2

pK_a of benzoic acid < pK_a of acetic acid

So, benzoic acid is the stronger acid.

5 0
3 years ago
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