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adoni [48]
3 years ago
8

What did Ernest Rutherford’s gold foil experiment demonstrate about atoms ?

Chemistry
2 answers:
Alchen [17]3 years ago
4 0

Answer:

Their positive charge is located in the small nucleus

Explanation:

Ernest Rutherford performed the gold foil experiment in 1911 where he used alpha particles generated from a radioactive source to bombard a thin gold foil.

In his experiment, he observed that the bulk of the alpha particles passed through the gold foil, just a tiny fraction was deflected back. To explain his findings, Rutherford proposed that an atom is made of positively charged centre where nearly all the mass is concentrated called nucleus. Surrounding the nucleus is a large space containing electrons.

worty [1.4K]3 years ago
4 0

He discovered that other than the nucleus at the center, atoms are mostly just empty space. So A makes the most sense.

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Which of the following is most appropriate in measuring the mass of a cow; kilogram, gram or meter? Explain your answer with det
Blababa [14]
The most appropriate unit to take the weight of a cow would be kilograms.

Meters are a unit of distance and are not applicable here
A gram is too small to use in this instance
7 0
3 years ago
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when obtaining energy, why mushrooms are more like elephants eating and not like dandelions absorbing sunlight.
Julli [10]

Answer:

Because they lack chlorophyll (a green pigment in plants that helps them trap sunlight, used to manufacture their food through photosynthesis)

Explanation:

Mushrooms are heterotrophs. They are not plants or autotrophs. Mushrooms, just like every living thing that exists need energy in order to live. Only plants, or autotrophs, can directly use energy from the sun (the ultimate energy) to make food. Those organisms that cannot harness the sun's energy are known as heterotrophs. Mushrooms are fungi (belong to kingdom Fungi) and are heterotrophs because they decompose and consume nutrients from the soil. They are not green so they cannot photosynthesis due to lack of chlorophyll.

6 0
3 years ago
A gas has a pressure of 25 atm at 303 K . What is the temperature if the pressure drops to 20 atm?
liberstina [14]

<em>Answer: But Thats Aight</em>

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<em>Explanation: 301</em>

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3 0
2 years ago
How is stoichiometry used to calculate energy released when a mass of liquid freezes?
kati45 [8]

Answer:

D. Grams liquid x mol/g x delta Hf​reezing

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to reason that the stoichiometry used to calculate energy released when a mass of liquid freezes, involves the grams of the liquid, the molar mass of the liquid, as given in all the group choices, and the enthalpy of freezing because that is the process whereby a liquid goes solid.

In such a way, we infer that the correct factor would be D. Grams liquid x mol/g x delta Hf​reezing which sometimes is the negative of the enthalpy of fusion as they are contrary processes.

Regards!

6 0
3 years ago
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wel

Answer:

5000kg/m³

Explanation:

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d=m/v

d=100/20

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5g/m³*1000=5000kg/m³

4 0
2 years ago
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