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horrorfan [7]
2 years ago
6

An obsolete scientific theory is a scientific theory that, though once widely accepted, has since been discarded. For example, t

he Flat Earth theory, which states that the Earth's shape is flat, like that of a paper, is an obsolete scientific theory. This is because it was later proven that the Earth's shape is not flat, but almost spherical.
Which of the following is another obsolete scientific theory?
Chemistry
1 answer:
gladu [14]2 years ago
3 0

Another example of an obsolete scientific theory is Lamarck theory that was challenged by Darwinian evolution.

<h3>What is an obsolete scientific theory?</h3>

An obsolete or superseded scientific theory is a scientific theory that, though once widely accepted, has since been discarded or superseded.

According to this question, one example of obsolete scientific theory is Flat Earth theory, which states that the Earth's shape is flat, like that of a paper.

Another example of an obsolete scientific theory is Lamarck theory that was challenged by Darwinian evolution.

Learn more about obsolete theory at: brainly.com/question/14583659

#SPJ1

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When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2 Al ( s ) + 6 HCl ( aq ) ⟶ 2AlCl3 ( aq ) +
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Answer:

The answer to your question is  V = 19.9 L

Explanation:

Data

mass of Al = 8.60 g

volume of H₂ = ?

Balanced chemical reaction

                 2Al  +  6HCl  ⇒   2AlCl₃  +  3H₂

1.- Use proportions to calculate the mass of H₂ produced

Atomic mass of Al = 2 x 27 = 54 g

Atomic mass of H₂ = 6 x 1 = 6 g

                54 g of Al -------------------- 6 g of H₂

                  8 g  of Al -------------------  x

                  x = (8 x 6) / 54

                  x = 48 / 54

                  x = 0.89 g of H₂

2.- Calculate the volume of H₂

- Convert the H₂ to moles

                    1 g of H₂ --------------- 1 mol

                   0.89 g    ---------------- x

                    x = 0.89 moles

                    1 mol of H₂ -------------- 22.4 l

                   0.89 moles  ------------- x

                    x = (0.89 x 22.4) / 1

                   x = 19.9 L                        

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