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loris [4]
3 years ago
15

The primary difference between a scientific theory and a scientific law is that a law:

Chemistry
1 answer:
Marat540 [252]3 years ago
4 0

Answer:

The correct answer is option c)  has been heavily tested through repeated experimentation

Explanation:

Scientific laws are descriptive statements of relationships between observable phenomena. Scientific theories are explanations that are inferred from observable phenomena or regularities in those phenomena.

In other words, a scientific theory is the approach of a hypothetical-deductive system that constitutes a scientific explanation or description to a related set of observations or experiments. It is based on hypotheses or assumptions verified by groups of scientists and generally covers several scientific laws. These laws become part of the basic assumptions and hypotheses of the theory that will encompass the knowledge accepted by the scientific community.

So, a theory is a set of rules that describe the behavior of a particular system and a particular rule that is present in all known theories and is therefore considered "universally applicable."

An example is modern physics. This is a set of many theories, depending on the system to study. You have, for example, quantum mechanics for small-scale systems, special relativity for high-speed objects and general relativity for very massive systems. In all of them the conservation of energy is fulfilled. Therefore, the conservation of energy is called "law", while quantum mechanics, special relativity and general relativity have the category of "theory", being limited to concrete systems.

All of the above leads to being able to say that a theory tries to explain some phenomenon and is accepted as true by the scientific community. Theories describe the behavior of some specific system. A theory may be proven over the years that is not true. A law is what is scientifically proven to be true, it is universally applicable. For example, a theory can become law when it is demonstrated, for example, mathematically or experimentally. A law can also be revised and changed, but it is generally considered true and does not usually change.

So, the correct answer is option c)

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The edge of the card measures 2.5 inches, what is it in cm?
Citrus2011 [14]

Answer:

6.35 centimeters

Explanation:

<em>2.5 inches</em> = <em>6.35 centimeters</em>

Formula:

  • <em>multiply </em><em>the value in </em><em>inche</em><em>s by the </em><em>conversion</em><em> factor '</em><em>2.54'.</em>

So, 2.5 inches = 2.5 × 2.54 = 6.35 centimeters.

4 0
2 years ago
A sodium atom has a mass number of 23. Its atomic number is 11. How many electrons does a neutral sodium atom have?
NemiM [27]

Answer:

it contains 11 electrons

Explanation:

4 0
3 years ago
Butane C4H10 (g),(Hf = –125.7), combusts in the presence of oxygen to form CO2 (g) (Delta.Hf = –393.5 kJ/mol), and H2O(g) (Delta
shusha [124]

Answer: The enthalpy of combustion, per mole, of butane is -2657.4 kJ

Explanation:

The balanced chemical reaction is,

2C_4H_{10}(g)+13O_2(g)\rightarrow 8CO_2(g)+10H_2O(g)

The expression for enthalpy change is,

\Delta H=[n\times H_f_{products}]-[n\times H_f_{reactants}]

Putting the values we get :

\Delta H=[8\times H_f_{CO_2}+10\times H_f_{H_2O}]-[2\times H_f_{C_4H_{10}+13\times H_f_{O_2}}]

\Delta H=[(8\times -393.5)+(10\times -241.82)]-[(2\times -125.7)+(13\times 0)]

\Delta H=-5314.8kJ

2 moles of butane releases heat = 5314.8 kJ

1 mole of butane release heat = \frac{5314.8}{2}\times 1=2657.4kJ

Thus enthalpy of combustion per mole of butane is -2657.4 kJ

3 0
3 years ago
What is the percent by volume of isopropyl alcohol in a solution that contains 45 ml of isopropyl alcohol in 1.4 L of water?
11Alexandr11 [23.1K]

Answer:

3.11%

Explanation:

We express a solution's volume by volume percent concentration, % v/v,

Take the ratio of the isopropyl alcohol (IPA) volume to the total volume of the solution, which is 1400 mL of water+ 45 mL of IPA,

and multiply by 100 to get the percentage:    45/(1400+45) *100 = 0.0311*100 =  3.11%

6 0
3 years ago
The movement of the earths plates is also called:
Ksenya-84 [330]
The movement of the Earth's plates is called Plate Tectonics.  Hope this helps! :D
4 0
4 years ago
Read 2 more answers
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