1 answer:
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Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.
Answer:
all 4 of the middle ones are part of the nucleus
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1.Respiration of animals and plants.
2.The burning of fossil fuels.
3.Bacteria decompose corpses.
<h3>
Answer:</h3>
- K₂S
- CaSO₄ (slightly soluble in water)
- Pb(ClO₄)₂
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Explanation:</h3>
- Mg(OH)₂ and CoCO₃ are insoluble in water.
- Solubility rules are used to determine whether a compound will be soluble or not soluble in aqueous form.
- K₂S is soluble in aqueous solutions as all salts of Potassium are soluble in water.
- Calcium (ii) sulfate is slightly soluble in water.
- Hydroxides are insoluble in water except, KOH, NaOH and NH₄OH.and Barium hydroxide. Therefore, Mg(OH)₂ is an insoluble hydroxide.
- CoCO₃ is insoluble since carbonates are insoluble except K₂CO₃, Na₂CO₃ and (NH₄)₂CO₃. .
- Pb(ClO₄)₂ is soluble because all perchlorates are soluble.
