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Ilia_Sergeevich [38]
2 years ago
7

What 2 solutions could help restore the ecosystem back to normal?

Chemistry
1 answer:
Pavel [41]2 years ago
6 0
  • Renewable energy and energetic efficiency. ...
  • The electric vehicle. ...
  • Greater environmental control. ...
  • Air purifiers. ...
  • Graphene filter for water. ...
  • Food sovereignty and agroecology. ...
  • Sustainable development.
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If a pharmacist adds 10 ml of purified water to 30 ml of a solution having a specific gravity of 1.30, calculate the specific gr
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The specific gravity of a sample is the ratio of the density of the sample with respect to one standard sample. The standard sample used in specific gravity calculation is water whose density is 1 g/mL. The solution having specific gravity 1.30 is the density of the sample that is 1.30 g/mL. Thus the weight of the 30 mL sample is (30×1.30) = 39 g.

Now the mass of the 10 mL of water is 10 g as density of water is 10 g/mL. Thus after addition the total mass of the solution is (39 + 10) = 49g and the volume is (30 + 10) = 40 mL. Thus the density of the mixture will be \frac{49}{40}=1.225 g/mL. Thus the specific gravity of the mixed sample will be 1.225 g/mL.

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