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zhenek [66]
3 years ago
9

Which are exmaples of chemical change?

Chemistry
1 answer:
kifflom [539]3 years ago
7 0

Answer:

cold butter melted when heated, lighting a match, baking cookies,

Explanation:

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For what reasons would modern scientists accept dalton's atomic theory but not the idea of an atom proposed by the greek philoso
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Solution:

The idea of an atom proposed by the Greek philosophers because:

According to Greek Philosopher, matter is composed of small and indivisible particles called atoms. He introduced atoms as too small to be seen, unchangeable, completely solid without internal structure. He proposed that atoms are of variety of shapes and sizes which is responsible for different types of matter.

But according to Dalton’s atomic theory, chemical elements have atoms, which are identical in weight. The different elements have different atoms of different weight. Atoms can combine in whole-number ratios to form compounds. These observations are already introduced by Greek philosopher, but the idea of atomic weight is introduced by Dalton. He introduced the list of 21 elements with their atomic weights and, he was the first to propose the element’s symbol.

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3 years ago
An Erlenmeyer flask contains 25.00 mL of 0.10 M HCl. What is the pH of the solution?
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C=0.10 mol/l

pH=-lg[H⁺]

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pH=-lgc

pH=-lg0.10=1.0

pH=1.0
4 0
4 years ago
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Answer:

Both answer choice 2 and answer choice 3 are correct choices.

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Biotic factors are living components in an ecosystem. They are living organisms which affect another living component in an ecosystem.

Antibiotic factors are non living components of an ecosystem. They are chemicals which affect living organisms.

The choice 2 is correct. The seeds spread out by mice is a biotic factor interacting with an antibiotic factor

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The answer is D. Liquid to Solid
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