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navik [9.2K]
3 years ago
8

Who first proposed that matter is composed of tiny, indivisible particles?

Chemistry
1 answer:
nasty-shy [4]3 years ago
3 0
In the 5th century BC, Democritus of Abdera proposed the idea of an atom, which was advanced as the smallest, individual particles 

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How can I make equilibrium shift to the right in a reversible reaction?
labwork [276]

Answer:

According to Le Chatelier's principle, adding additional reactant to a system will shift the equilibrium to the right, towards the side of the products. By the same logic, reducing the concentration of any product will also shift equilibrium to the right.

Explanation:

8 0
3 years ago
When any salt is dissolved in water, the ionic bonds between the atoms must be broken in order for the salt to dissolve. The ene
Ksju [112]

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C released to the environment

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I just did it in class

5 0
3 years ago
Which describes colloids? Check all that apply.
nirvana33 [79]

Answer:

In chemistry, a colloid is a mixture in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance. ... Some colloids are translucent because of the Tyndall effect, which is the scattering of light by particles in the colloid.

Credit to: Colloid - Wikipedia

https://en.wikipedia.org › wiki › Colloid

Explanation:

4 0
3 years ago
Diborane (B2H6) has been considered as a possible rocket fuel. Calculate DH° for the reaction B2H6(g) ---> 2B(s) + 3H2(g) usi
svlad2 [7]

Answer:

A. DH° = –36 kJ

Explanation:

It is possible to obtain DH° of a reaction by the sum of DH° of half reactions. The DH° of the reaction:

B₂H₆(g) → 2B(s) + 3H₂(g)

Could be obtained from:

<em>(1) </em>2B(s) + 1.5O₂(g) → B₂O₃(s) DH° = –1273kJ

<em>(2) </em>B₂H₆(g) + 3O₂(g) → B₂O₃(s) + 3H₂O(g) DH° = –2035kJ

<em>(3) </em>H₂(g) + 0.5O₂(g) → H₂O(g) DH° = –242kJ

The sum of (2) - (1) gives:

B₂H₆(g) + 1.5O₂(g) → 2B(s) + 3H₂O(g) DH° = -2035kJ - (-1273kJ) = -762kJ

Now, this reaction - 3×(3):

B₂H₆(g) → 2B(s) + 3H₂(g) DH° = -762kJ - (3×-242kJ) = -36kJ

Thus, right answer is:

<em>A. DH° = –36 kJ</em>

3 0
3 years ago
In an ionic bond, nonmetals are most likely to
kompoz [17]
Non metals gain electrons from the metals to have an octet structure.
8 0
3 years ago
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