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3 years ago

Do some alkalis burn your skin

Chemistry

1 answer:

Ne4ueva [31]3 years ago

4 0

Answer:

Alkalis cause deeper burns as they continue to penetrate the skin following initial contact. The mainstay of initial management of all chemical burns remains the same.

Explanation:

A 48-yr-old female patient presented to our hospital’s emergency department with burns in the left wrist. The lady had an ongoing problem of chronic wrist pain on the affected side. The night of the injury she had been using an ancient home remedy allegedly passed down from one generation to the next. This consisted of a concoction of coal ash, water, salt, and olive oil, which had to be turned into a paste and applied locally with the help of a bandage over the painful area.

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3 years ago

How do you obtain oxide from a mixture?

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2 years ago

During the daytime, wind blows off of the __________________ because that material takes ___________ time to get warm, creating

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2 years ago

A solution is made by dissolving 58.125 g of sample of an unknown, nonelectrolyte compound in water. The mass of the solution is

e-lub [12.9K]

Answer:

molecular weight (Mb) = 0.42 g/mol

Explanation:

mass sample (solute) (wb) = 58.125 g

mass sln = 750.0 g = mass solute + mass solvent

∴ solute (b) unknown nonelectrolyte compound

∴ solvent (a): water

⇒ mb = mol solute/Kg solvent (nb/wa)

boiling point:

ΔT = K*mb = 100.220°C ≅ 373.22 K

∴ K water = 1.86 K.Kg/mol

⇒ Mb = ? (molecular weight) (wb/nb)

⇒ mb = ΔT / K

⇒ mb = (373.22 K) / (1.86 K.Kg/mol)

⇒ mb = 200.656 mol/Kg

∴ mass solvent = 750.0 g - 58.125 g = 691.875 g = 0.692 Kg

moles solute:

⇒ nb = (200.656 mol/Kg)*(0.692 Kg) = 138.83 mol solute

molecular weight:

⇒ Mb = (58.125 g)/(138.83 mol) = 0.42 g/mol

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2 years ago