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2 years ago

Mike dissolves equal amounts of potassium chloride (KCl) and table sugar (C12H22O11) in the same container of water.

1 answer:

3 0

Molecules of KCl and C6 H12 O6 molecules of KCl and C6, H 12, O6, will be present on dissolving equal amount of potassium chloride (KCl) and table sugar (C12H22O11) in the same container of water.

Dissolving the sugar within the water makes a homogenous aggregate and once dissolved an answer is made by the combination of a solute (sugar) and solvent. If a solute is a strong or liquid, growing the temperature will increase its solubility. as an example, greater sugar can dissolve in warm water than in cold water. If a solute is a gasoline, increasing the temperature decreases its solubility.

The solvent is the substance which commonly determines the physical state of the solution (stable, liquid or gas). The solute is the substance which is dissolved by means of the solvent. as an example, in an answer of salt and water, water is the solvent and salt is the solute.A supersaturated solution is an answer that contains greater than the maximum quantity of dissolved solute than a saturated solution below the identical conditions.

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which has more kinetic energy, a 5-kg object moving at 5 m/s 1 m off the ground or a 5-kg object at rest 2 m off the ground?

irina1246 [14]

Answer:

Explanation:

Kinetic energy is the energy due to changes in position of a body. It is always with regards to motion of a body.

Potential energy on the other hand is the energy at rest of a body.

To estimate kinetic energy, we use the formula:

K.E = $\frac{1}{2}m v^{2}$

where m is the mass of the body and v is the velocity of the object.

mass is 5kg and velocity is 5ms⁻¹

K.E = $\frac{1}{2}5 x 5^{2}$

K.E = 62.5J

for the object at rest;

potential energy is calculated:

P.E = mgh

where m is the mass, g is the acceleration due to gravity and h is the height

m is 5kg, h is 2 and g is 9.8

P.E = 5 x 9.8 x 2 = 98J

The moving object has kinetic energy with the object at rest having potential energy.

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3 years ago

HELPPPPP MEEEEEEEEEEEE

Kazeer [188]

Answer:

Alpha particle or helium nuclei.

Explanation:

Alpha particle:

Alpha particle is emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4 and atomic number less than 2 as compared to parent atom the starting atom.

Properties of alpha radiation:

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

₉₂U²³⁸ → ₉₀Th²³⁴ + ₂He⁴ + energy

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3 years ago

How does the structure of a saturated fatty acid differ from an unsaturated fatty acid? Based on its structure, how does an unsa

Sonbull [250]

Answer:

unsaturated fatty acid are liquid in nature, posses multiple bond in it's structure where as saturated fatty acid are solid in nature, have only single bonds in it's structure.

7 0

3 years ago

A 29.4 ml sample of 0.347 m triethylamine, (c2h5)3n, is titrated with 0.375 m hydrobromic acid. at the equivalence point, the ph

Debora [2.8K]

A 29.4 ml sample of 0.347 m triethylamine, (c2h5)3n, is titrated with 0.375 m hydrobromic acid. at the equivalence point, the pH is 5.81.

Given,

Volume of Triethylamine (C₂H₅)₃N = 29.4 ml = 0.0294 L

Molarity of (C₂H₅)₃N = 0.275 M

Molarity of HBr = 0.375M

Solution:

(C₂H₅)₃N + HBr ⇔ (C₂H₅)₃ NH⁺ + Br⁻

⇒ Volume of HBr = mole of (C₂H₅)₃N / Molarity of HBr

⇒ Volume of HBr = 0.00572 mol / 0.375 mol/l

⇒ Volume of HBr = 0.0152 L

∴ Total Volume = 0.0294 + 0.0152

⇒ Total Volume = 0.0446 L

Concentration of (C₂H₅)₃NH⁺ = $\frac{0.00572}{0.0446}$ ⇒ 0.128 M,

(C₂H₅)₃NH⁺ + H₃O⁺ ⇄ (C₂H₅)₃N + H₃O⁺

let's assume, (C₂H₅)₃N = $x$ ,

⇒ H₃O⁺ = $x$ , and

⇒ (C₂H₅)₃NH⁺ = 0.128 - $x$

∴ Now, k = kw / kb

⇒ k = 1.9 × 10⁻¹¹

and, k = [(C₂H₅)₃N][H₃O⁺] / (C₂H₅)₃NH⁺

⇒ 1.9 × 10⁻¹¹ = $x^{2}$ / (0.128 - $x$ )

Thus, $x$ = 1.55 × 10⁻⁶ M,

Hence, pH = - log[x]

⇒ - log [1.55 × 10⁻⁶ ]

⇒ - log (1.55) - log (10⁻⁶)

⇒ - log (1.55) + 6log10

⇒ - 0.19 + 6

⇒ 5.81 = pH

Therefore, pH = 5.81.

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2 years ago

A molecule of carbon dioxide (co2) is formed when one atom of carbon (atomic number 6) is covalently bonded with two atoms of ox

xxMikexx [17]

<span>Carbon must share 4 electrons total with the the two Oxygen atoms in order to fill it's outer electron shell, and each Oxygen atom must share 2 electrons with the Carbon atom to fill their electron shells. Therefore, in total 8 electrons must be shared (4+2+2=8)</span>

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4 years ago