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gizmo_the_mogwai [7]
2 years ago
13

The ionic radius of a sodium ion is 2.27 angstroms (A) . What is this length in um

Chemistry
1 answer:
kipiarov [429]2 years ago
6 0

\boxed{\sf 1Å=10^{-10}m}

\\ \rm\longmapsto 2.27Å

\\ \rm\longmapsto 2.27\times 10^{-10}m

\\ \rm\longmapsto 0.227\times 10^{-9}m

\\ \rm\longmapsto 0.0227\times 10^{-8}m

\\ \rm\longmapsto 0.00227\times 10^{-7}m

\\ \rm\longmapsto 0.00023\times 10^{-6}m

\\ \rm\longmapsto 0.00023\mu m

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2 years ago
At 50 degree C pK_w = 13.26. What is the pH of pure water at this temperature?
Ksivusya [100]

Answer:

6.63

Explanation:

From the relationship;

pH = pKw/2

Pkw = 13.26

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8 0
2 years ago
Determine the y component of reaction at a using scalar notation. express your answer to three significant figures and include t
blagie [28]
In order to compute the y-component of a vector, we simply use the formula:

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6 0
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:

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8 0
2 years ago
Explain why groups 14 and 15 are better representatives of mixed groups than groups 13 and 16
Brrunno [24]
<h3><u>Answer</u>;</h3>

Groups 14 and 15 each contain metals, nonmetals, and metalloids while Group 13 contains metals and a metalloid, and Group 16 contains metalloids and nonmetals.

<h3><u>Explanation;</u></h3>
  • Groups 13–16 of the periodic table contain one or more metalloids, in addition to metals, nonmetals, or both.
  • Unlike other groups of the periodic table, which contain elements in one class, groups 13–16 referred to as mixed groups contain elements in at least two different classes. In addition to metalloids, they also contain metals, nonmetals, or both.
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  • <em><u>Group 15 also known as the Nitrogen group contains non metals such as oxygen, metalloid tellurium and a metal polonium.</u></em>
3 0
2 years ago
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