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zhannawk [14.2K]
3 years ago
9

TIMED!!

Chemistry
1 answer:
ASHA 777 [7]3 years ago
4 0

Answer:

Hey mate hope its help you........

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How did the development of the earliest idea about atoms differ from the later work of scientists?
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The early ideas of the atom states that the indivisible object is hollow or is a solid object with nothing inside. The later discoveries or works of the scientists states that inside the atoms are the subatomic particles which are the electrons, protons, and neutrons. 
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hope its not to late..............Samira's model correctly demonstrates how the properties changed with the rearrangement of the atoms. However not all atoms are accounted for. There is a missing reactant. Samira's model correctly demonstrated how the atoms in two compounds reacted to form two new products. However, the elements present in the reactants side should be the elements that make up the new products in the product side. But as the diagram shows, Sameera has mistakenly added a new element to one of her products which will be wrong.

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3 years ago
What is the amount of space that a gas takes up called?
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The answer is:Matter
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QUESTION TWO
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Answer: The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation.

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3 years ago
The positive sign of the energy difference in a chemical reaction would indicate that ..........
trasher [3.6K]

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B) the chemicals are gaining energy from the surroundings.

Explanation:

The positive sign of the energy difference in a chemical reaction would indicate that the chemicals are gaining energy from the surroundings. This is what happens in an endothermic reaction.

In an endothermic reaction, heat is absorbed from the surroundings hence the surrounding becomes colder at the end of the changes.

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