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atroni [7]
3 years ago
5

Which of the following are negative impacts on land resources caused by human activity? Check all that apply.

Chemistry
1 answer:
Sergio [31]3 years ago
8 0

Answer:

Hello :D

Explanation:

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The precaution to be taken while measuring the temperature of a liquid in a beaker is applying proper heat balance and taking all the required precautions.

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13. What is the symbol for Enthalpy change?
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Answer:

Explanation:

13 ) symbol of enthalpy change = Δ H .

14 ) enthalpy change is nothing but heat absorbed or evolved .

During fusion enthalpy change

Δ H .= m Lf , m is mass and Ls is latent heat of fusion

During evaporation, enthalpy change

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during temperature rise , enthalpy  change

Δ H = m c Δ T

In case of gas , enthalpy change can be calculated by the following relation

Δ H = Δ E + W , Δ E is change in internal energy , W is work done by gas.

15 ) When enthalpy change is negative , that means heat is released to the environment .So reaction is called exothermic .

when heat is absorbed enthalpy change is positive . Reaction is endothermic.

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Identify all the examples that support the Law of Conservation of Mass through chemical changes.
wariber [46]

Answer:

B

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Explanation:

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