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2 years ago

Which property could allow a student to easily separate sand and iron filings? (1 point,

1 answer:

5 0

Magnetic separation is a method that uses magnetic force to remove the magnetically sensitive material from a mixture. Because iron is attracted by magnets, this is the ideal method for separating sand and iron fillings.

Magnetism was the physical attribute that allowed this combination to be separated. I used the magnet to separate the iron filing from the sand in the mixture. The magnet attracted the iron filings but not the sand. We were able to separate the iron filings from the sand as a result of this.

Because iron is magnetic while the other two are not, a magnet may be used to pull the iron filings out of the mixture while leaving the salt and sand. Sand is not water-soluble, although salt is. This implies they may be combined in water and swirled together. The salt dissolves, but the sand does not.

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At 25°C, the equilibrium constant Kc for the reaction 2A(aq) ↔ B(aq) + C(aq) is 65. If 2.50 mol of A is added to enough water to

Svet_ta [14]

Answer:

0.146 M

Explanation:

Equation for the reaction :

2A(aq) ↔ B(aq) + C(aq)

$K_c$ = 65

Molar concentration of A = $\frac{2.50 mol}{1.00 L}$

= 2.5 M

2A(aq) ↔ B(aq) + C(aq)

Initial 2.50 0 0

Change - 2x + x + x

Equilibrium 2.50 - 2x +x +x

$K_c =\frac {[B][C]}{[A]^2}$

$65 = \frac{[x][x]}{[2.5-2x]^2}$

$65 = \frac{[x]^2}{[2.5-2x]^2}$

$65 = (\frac{[x]}{[2.5-2x]})^2$

$\sqrt 65 = \sqrt {(\frac{[x]}{[2.5-2x]})^2}$

$8.062 = \frac{x}{2.5-2x}$

8.062(2.5 - 2x) = x

20.155 - 16.124x = x

20.155 = 16.124x+x

20.155 = 17.124x

x = $\frac{20.155}{17.124}$

x = 1.177

[A] = 2.5 - 2x

= 2.5 - 2(1.177)

= 0.146 M

Therefore, the equilibrium concentration of A = 0.146 M

4 0

3 years ago

The work function of magnesium metal is 353 kJ/mol, which corresponds to light with a wavelength of 339 nm. Which of the followi

8_murik_8 [283]

350 nm because the magnesium reacts very aggressively toward these kind of situations.

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3 years ago

What is solvent!!?️

Flura [38]

Answer:

Solvent, substance, ordinarily a liquid, in which other materials dissolve to form a solution.

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3 years ago

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What is the outcome of ketosis? glycogen buildup metabolic alkalosis water retention and edema glucogenesis

blsea [12.9K]

<u>Metabolic acidosis</u> would be the result of ketosis. A buildup of ketones in the body that is too great leads to metabolic acidosis.

An excess of acids in the blood can lead to metabolic acidosis. When our kidneys find it difficult to sufficiently eliminate acid from human blood, this occurs.

Because there is an excessive amount of ketone bodies in the blood, ketoacidosis would be a metabolic acidosis with a significant anion gap (keto-anions). The liver releases ketone bodies (acetoacetate, beta-hydroxybutyrate, and acetone) into the blood when the state of the liver's lipid metabolism shifts to one of greater ketogenesis.

In addition to assisting with fat loss, ketosis can reduce your appetite. It also aids in maintaining muscle. Ketosis typically begins to occur in healthy individuals who do not have diabetes and are not pregnant after 3 to 4 days of consuming just under 50 grams of carbohydrates each day.

Therefore, the outcome of ketosis will be <u>Metabolic acidosis</u>

To know more about ketosis.

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2 years ago

What is deoxyribonucleic acid, the name for DNA?

jek_recluse [69]

None of the above, deoxyribonucleic acid is the full name of the abbreviation DNA

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3 years ago