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telo118 [61]
3 years ago
15

Describe what conditions exist in water molecules to make them dipolar.

Chemistry
1 answer:
lesantik [10]3 years ago
4 0
<span>The bent geometry of the water molecule gives a slight overall negative charge to the oxygen side of the molecule and a slight overall positive charge to the hydrogen side of the molecule. This slight separation of charges gives the entire molecule an electrical polarity, so water molecules are dipolar.</span>
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Dr. Arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two c
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C.Experimental thats the answer
3 0
3 years ago
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We have a 1 liter sample of water containing 1.4 mg lead per mL. Lead levels in water above 0.25 ug/mL are unsafe to drink. We c
Orlov [11]

Answer:

79 extractions

Explanation:

An<em> isooctane/water partinioning constant</em> of 12/1 means that 12 out of 13 parts of the Pb²⁺ complex will be found in isooctane, while the remaining 1 out of 13 part will remain in water.

  • 12/13 * 100 = 92.3% of the Pb²⁺ will be removed with each extraction.

Now we <u>convert 1.4 mg/mL to ug/mL</u>:

  • 1.4 \frac{mg}{mL} * \frac{100ug}{1mg} = 140 ug/mL

We're looking to have a final concentration of 0.25 ug/mL, so we can write:

  • 140 mg/mL * (0.923)ⁿ = 0.25 ug/mL

Where <em>n</em> is the number of extractions.

We <u>solve for </u><u><em>n</em></u>:

  • (0.923)ⁿ = 1.786x10⁻³
  • n = ln (1.786x10⁻³) / ln (0.923)
  • n = 79
3 0
3 years ago
Which types of substances dissolve better in water: hydrophobic or hydrophilic substances? why do you think so?
Alexxx [7]
Hydrophilic substances will dissolve better in water than hydrophobic substances. A substance that is hydrophilic is water loving or easily dissolved in water. Molecules of these substances form ionic bonds with the water molecules. Hydrophilic substances include alcohols. Hydrophobic substances repel water and do not mix. 
4 0
4 years ago
Coal power plants burn large amounts of coal, C(s), in an 02(g) atmosphere to generate electricity. The chemical reaction respon
Stella [2.4K]

Answer:

1.85 × 10⁸ L

Explanation:

Coal power plants burn large amounts of coal, C(s), in an O₂(g) atmosphere to generate electricity. The chemical reaction responsible for producing this energy is shown below:

C(s) + O₂(g) → CO₂(g)

Determine the volume of CO₂ in liters produced when 100 metric ton of C(s) is completely burned in an O₂ atmosphere. The density of CO₂ is 1.98 kg/m³ (1 metric ton = 1000 kg: 1 m³ = 1000 L)

We can establish the following relations:

  • 1 metric ton = 1000 kg
  • 1 kg = 1000 g
  • The molar mass of C(s) is 12.01 g/mol
  • The molar ratio of C(s) to CO₂(g) is 1:1
  • The molar mass of CO₂(g)  is 44.01 g/mol
  • 1.98 kg of CO₂(g)  occupy a volume of 1 m³ (density = 1.98 kg/m³)
  • 1 m³ = 1000 L

The volume of CO₂ produced when 100 metric ton of C(s) react is:

100metric/tonC.\frac{10^{6}gC}{1metric/tonC} .\frac{1molC}{12.01gC} .\frac{1molCO_{2}}{1molC} .\frac{44.01 \times 10^{-3} kgCO_{2}}{1molCO_{2}} .\frac{1m^{3}CO_{2}}{1.98kgCO_{2}} .\frac{1000LCO_{2}}{1m^{3}CO_{2}} =1.85 \times 10^{8} LCO_{2}

3 0
3 years ago
2 Na2O + CO = Na2CO3 + Na
Vikki [24]

Moles of Na_2O

  • Given mass/Molar mass
  • 35/62
  • 0.56mol

2 mols Na_2O produces 1 mol sodium carbonate.

1 mol sodium oxide produces 0.5mol sodium carbonate

Moles of sodium carbonate

  • 0.56(0.5)
  • 0.28mol

Molar mass

  • 2(23)+12+3(16)
  • 46+12+48
  • 106g/mol

Mass

  • 0.28(106)
  • 29.7g
8 0
2 years ago
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