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Jobisdone [24]
3 years ago
12

What is the formula for chromium (II) acetate?

Chemistry
1 answer:
Alexeev081 [22]3 years ago
3 0

Answer:

Cr2(CH3CO2)4(H2O)2

Explanation:

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The density of an object never changes when the temperature of that object changes
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How can you distinguish a clastic sedimentary rock from a crystalline formed sedimentary rock?
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List 5 examples of electromagnetic radiation.
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What is the vapor pressure at 20 °c of an ideal solution prepared by the addition of 7.38 g of the nonvolatile solute urea, co(n
Romashka [77]

Answer:

83.24 mmHg.

Explanation:

  • <em>The vapor pressure of the solution (Psolution) = (Xmethanol)(P°methanol).</em>

where, Psolution is the vapor pressure of the solution,

Xmethanol is the mole fraction of methanol,

P°methanol is the pure vapor pressure of methanol.

  • We need to calculate the mole fraction of methanol (Xmethanol).

<em>Xmethanol = (n)methanol/(n) total.</em>

where, n methanol is the no. of moles of methanol.

n total is the total no. of moles of methanol and urea.

  • We can calculate the no. of moles of both methanol and urea using the relation: n = mass/molar mass.

n of methanol = mass/molar mass = (56.9 g)/(32.04 g/mol) = 1.776 mol.

n of urea = mass/molar mass = (7.38 g )/(60.06 g/mol) = 0.123 mol.

∴ Xmethanol = (n)methanol/(n) total = (1.776 mol)/(1.776 mol + 0.123 mol) = 0.935.

<em>∴ Psolution = (Xmethanol)(P°methanol)</em> = (0.935)(89.0 mmHg) =<em> 83.24 mmHg.</em>

7 0
3 years ago
What types of teeth do mammals have? Select the three correct answers.
mariarad [96]

Answer:

incisors, molars, canines.

Explanation:

All of these 3 teeth types appear in ourselves so in conclusion mammals. Plus there has never been gills in any mammal.

5 0
2 years ago
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