Answer:
Explanation:
20.1 + 2.00100 +48.28 + 0.015 = 70.396 ≈ 70.4
3 s.f. 6 s.f. 4 s.f. 3 s.f 3 s.f
D It is released or absorbed.
Explanation:
To form a solution, energy is absorbed or released in the process.
A solution is a substance made up of solute dissolved in a solvent. The solute is the dissolved substance where as the solvent is the dissolving medium.
- To form a solution, solutes are dissolved.
- In this dissolution reaction, energy is used to break bonds within the solute to bring them in contact with the solvent.
- The combination of the solute with the solvent is a bond formation process.
- Bond formation is an exothermic process in which energy is released.
- Bond breaking process is endothermic in which energy is absorbed.
- To form solutions, bonds are formed and broken.
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The answer is D) Gravity is dependent on mass and strong nuclear force is not.
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