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klio [65]
3 years ago
10

What are the three keys to keeping water clean? effective cleanup of oil and gasoline spills adding sediment to the water to red

uce sunlight absorption proper sewage treatment pouring pesticides and chemicals down drain pipes reduction of pollutants?
Chemistry
2 answers:
KengaRu [80]3 years ago
5 0
1. <span>Effective cleanup of oil and gasoline spills
2. </span><span>Proper sewage treatment
3. </span><span>Reduction of pollutants</span>
boyakko [2]3 years ago
4 0

Explanation:

Water is a natural resource and we should not waste it and try to keep rivers, ponds, lakes etc clean by not throwing any garbage, lather, human waste etc into it.

Three ways to keep the water clean are as follows.

  • Effective cleanup of oil and gasoline spills.
  • Proper sewage treatment.
  • Reduction of pollutants.
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561 g P₂O₃

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To find the mass of P₂O₃, you need to (1) convert moles H₃PO₃ to moles P₂O₃ (via mole-to-mole ratio from equation coefficients) and then (2) convert moles P₂O₃ to grams P₂O₃ (via molar mass). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the amount of sig figs in the given value.

Atomic Mass (P): 30.974 g/mol

Atomic Mass (O): 15.998 g/mol

Molar Mass (P₂O₃): 2(30.974 g/mol) + 3(15.998 g/mol)

Molar Mass (P₂O₃): 109.942 g/mol

1 P₂O₃ + 3 H₂O -----> 2 H₃PO₃

10.2 moles H₃PO₃            1 mole P₂O₃              109.942 g
----------------------------  x  --------------------------  x  -------------------  =  561 g P₂O₃
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