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yanalaym [24]
3 years ago
7

Who believed that a grain of sand could be divided indefinitely?

Chemistry
1 answer:
Ilya [14]3 years ago
4 0

Answer:

Democritus

Explanation:

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NaOH  + H2SO4 =
mariarad [96]
2NaOH+H_2SO_4\Rightarrow\ Na_2SO_4+2H_2O\\
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Cu(OH)2+H_2SO_4\Rightarrow\ CuSO_4+2H_2O\\
Cu(OH)_2+2HNO_3\Rightarrow\ Cu(NO_3)_2+2H_2O
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2 years ago
When water vapor cools it condenses select the number that represents this process on the diagram
TiliK225 [7]
2 is the correct answer.
6 0
3 years ago
Read 2 more answers
A student observes two strips of magnesium, mg ribbon that are each 3cm long. One strip of magnesium
ankoles [38]

Therefore option c , i.e. The substances in both test tubes are reactive only at high temperatures. is the only statement which is NOT supported by the student's observations.

<h3>What is the reaction between Magnesium and Hydrogen ?</h3>

Magnesium reacts with hydrochloric acid to produce hydrogen gas

Mg (s) + 2 HCl (aq) → MgCl₂ (aq) + H₂ (g)

In this reaction, the magnesium and acid are gradually used up , which can be seen in the test tube 2 .

A chemical reaction is taking place in Test tube 2 ,

Hydrogen gas is released in test tube 2 ,

Energy is released in the reaction involving hydrochloric acid and we can see in test tube 2 the reaction is going on

therefore option C i.e. The substances in both test tubes are reactive only at high temperatures. is the only statement which is NOT supported by the student's observation.

To know more about the chemical reaction between Magnesium and Hydrogen and this test.

brainly.com/question/19062002

#SPJ4

6 0
2 years ago
What is the conservation of mass
adelina 88 [10]

Answer: This is the definition if that's what you want.

Explanation:The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system's mass cannot change, so quantity can neither be added nor be removed.

8 0
3 years ago
How many oxygen atoms are in this chemical formula? 2CH3OH
svetoff [14.1K]

Answer:

1 oxygen atom is present.

Explanation:

8 0
2 years ago
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