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Alborosie
3 years ago
12

Which statement best describes scientific laws? Scientific laws are facts that describe natural events. Scientific laws are theo

ries that have been proven to be true. Scientific laws are based on opinions and testing. Scientific laws are the result of scientific explanations of ideas.
Chemistry
2 answers:
Fiesta28 [93]3 years ago
7 0
Well scientific laws are really laws! You can't change a scientific law and laws can be facts as well. Hope this helps!
user100 [1]3 years ago
7 0

Answer:

Scientific laws are facts that describe natural events.

Explanation:

When scientific theories have been repeatedly proven true after repeated experimentation they become known as scientific laws. Scientific laws describe some natural phenomenon. For example, Newton’s laws of gravity explained why the apple falls down from a tree and does not go up. Newton’s law of motion explains why a book sitting on table remains as is without changing position.

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First, we write the balanced equation for this reaction:

2KI + Pb(NO₃)₂ → 2KNO₃ + PbI₂

From this equation, we see that there are 2 moles of potassium iodide required for each mole of lead (II) nitrate. Moreover, we may use the formula:

Moles = volume (in L) * molarity

We find the molar relation ship for KI : Pb(NO₃)₂ to be 2 : 1. So:

M₁V₁ = 2M₂V₂

V₁ = 2M₂V₂/M₁
V₁ = 2 * 0.112 * 0.155 / 0.2
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The volume required is 173.6 mL
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