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Papessa [141]
2 years ago
6

A is an explanation of observations that have been tested many times.

Chemistry
1 answer:
Vanyuwa [196]2 years ago
6 0

Answer:

The correct answer is theory. Theory is an explanation of observations from the real world. A theory is developed after a hypothesis has been observed, tested and analyzed many times.

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The
Georgia [21]

Answer:

Elements

Explanation:

The  <u> elements</u> which are represented by a single uppercase letter, or represented by an uppercase letter followed  by a lowercase letter. This tells you the types of <u>elements</u> in the compound.

Elements are one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means. They are made up of small indivisible particles called atoms, all having the same number of protons.

6 0
3 years ago
Convert as indicated.
aleksklad [387]
B is the answer to that problem.
5 0
3 years ago
Read 2 more answers
I've a project about (air pollution), I want a questions about the topic, can anyone help me pls?​
Gnom [1K]

Answer:

different ways to pollute the air

Explanation:

just think of it like this what is black smoke to nothing lol the black smoke goes up into the atmosphere and pollutes the air just as somebody throwing trash into the ocean and polluting the ocean

8 0
3 years ago
2. Newton's first law says that
Vlada [557]

Answer:

Explanation:

Inertia is the reluctancy of a moving body to come to rest or change it direction or a body at rest to start moving

3 0
4 years ago
Read 2 more answers
A certain reaction is thermodynamically favored at temperatures below 400. K, but it is not favored at temperatures above 400. K
Ilya [14]

Answer:

-0.050 kJ/mol.K

Explanation:

  • A certain reaction is thermodynamically favored at temperatures below 400. K, that is, ΔG° < 0 below 400. K
  • The reaction is not favored at temperatures above 400. K, that is. ΔG° > 0 above 400. K

All in all, ΔG° = 0 at 400. K.

We can find ΔS° using the following expression.

ΔG° = ΔH° - T.ΔS°

0 = -20 kJ/mol - 400. K .ΔS°

ΔS° = -0.050 kJ/mol.K

8 0
3 years ago
Read 2 more answers
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