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Lyrx [107]
3 years ago
9

4.The scientific method is ________________ reasoning. You can make ______________ explanations for something that you are obser

ving in the world.
Chemistry
1 answer:
Novay_Z [31]3 years ago
4 0

Answer:

The scientific method is a system of reasoning. You can make reasonable explanations for something that you are observing in the world.

Explanation:

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What volume of a 1.0 M HCl is required to completely neutralize 25.0 ml of a 1.0 M KOH?
kirza4 [7]
The question above can be solved by using this equation: 
CAVA =CBVB
Where:
CA =Concentration of acid = 1.0 M
VA = Volume of acid = ?
CB = Concentration of base = 1.0 M
VB = Volume of base = 25 ml
VA = CBVB / CA
VA = [1 * 25] / 1 = 25 / 1 = 25
VA = 25 ml
Therefore, the volume of acid that is required to completely neutralize the base is 25 ml.<span />
8 0
3 years ago
What is the energy of a photon that emits a light of frequency 6.42 x 1014 Hz?<br><br>​
svetlana [45]

Answer:

Option B. 4.25×10¯¹⁹ J

Explanation:

From the question given above, the following data were obtained:

Frequency (f) = 6.42×10¹⁴ Hz

Energy (E) =?

Energy and frequency are related by the following equation:

Energy (E) = Planck's constant (h) × frequency (f)

E = hf

With the above formula, we can obtain the energy of the photon as follow:

Frequency (f) = 6.42×10¹⁴ Hz

Planck's constant (h) = 6.63×10¯³⁴ Js

Energy (E) =?

E = hf

E = 6.63×10¯³⁴ × 6.42×10¹⁴

E = 4.25×10¯¹⁹ J

Thus, the energy of the photon is 4.25×10¯¹⁹ J

3 0
3 years ago
Read 2 more answers
Describe some acidic oxides that can be prepared by thermal decomposition of nitrates and carbonates
azamat

When calcium carbonate is heated, it breaks down to form calcium oxide and carbon dioxide.

Thermal decomposition is the process in which heat is required.

It is also known as thermolysis.

It is processed in which a compound breaks into two or more products when the heat is supplied.

This reaction is used for the production of oxygen.

This reaction is also used for production of acidic as well as basic oxides.

CaCO3 on thermal decomposition gives:

CaCO3→CaO+CO2

CaO→ Basic oxide.

CO2→ Acidic oxide.

6 0
3 years ago
A neutral atom possesses an number of 13 and an atomic mass of 27.three electrons are lost.from what region of the atom are they
Pavlova-9 [17]
They are lost from valence shell (it's outermost shell of an atom).

->>> outside the atom
3 0
3 years ago
A simple pendulum of length 1.00 m has a mass of 100 g attached. It is drawn back 30.0° and then released. What is the maximum s
Softa [21]

Answer:

4.16ms-1

Explanation:

Vmax=√2gl(1-cos30)

=√2x 10x 1(1-cos30)

=√20x (1-cos 30)

√17.3205

=4.16ms-1

4 0
3 years ago
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