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Sergeu [11.5K]
3 years ago
8

What kinds of scientific investigations involve making observations?

Chemistry
1 answer:
rodikova [14]3 years ago
5 0
<span>1. Coherence Theory (Theory of Coherence)

Based on this theory, a knowledge considered to be true if the knowledge kehoren with the knowledge that exists and has been proven to be true. In the study of mathematics this is usually called the deductive nature.

2. Correspondence Theory (Theory of corespondence)

Based on this theory, a knowledge considered to be true if the knowledge of having a relationship with a reality that is true. This theory is based on the empirical fact that knowledge is true if there are facts that support that is true knowledge. Thus the truth here is based on inductive inference.

3. Pragmatic Theory (Theory of Pragmatism)

According to this theory, knowledge is said to be true if the knowledge is seen practically completely or have properties that true practicality. Followers of this theory argue that knowledge is true if it has keguanaan practical<span>.</span></span>
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Blababa [14]

Answer:

it's a chemistry change

Explanation:

this is because heat is causing permanent changes and can no longer be changed back to its original atate

6 0
2 years ago
When you see the word heptahydrate, what number should be written in front of the formula for water? 5 6 7 8?
Yuki888 [10]
Hept for 7, hence the number is seven.
8 0
3 years ago
Which would be a better base to use if you wanted to remove a proton from ethyne?
myrzilka [38]
-NH2 is the most favorable for the reaction
5 0
3 years ago
Select the fastest way to differentiate between the organic and aqueous layers of an extraction.a. Hold a white piece of paper b
valentinak56 [21]

Answer:

b. Add a few drops of one of the layers to a test tube containing 1 mL of water. Shake the test tube to determine the solubility of the layer in water

Explanation:

Option a is not true, it depends on the compound being extracted.

Option c is not true, although most of the solvents used in extractions have lower boiling point than water there are exceptions, for example toluene.

Option  d is not true. Again most of the solvents used in extractions are less dense than water, there are many exceptions, for example chloroform, so for equal volumes the chloroform layer will weigh more.

Option b. is the correct one.

One will test the  miscibility of the layer in water. If it inmiscible then one would know is the organic layer. If it is the aqueous layer then it will completely be miscible.

6 0
3 years ago
Perform the following operation
k0ka [10]

Answer:

1449 × 10 ^-5

Explanation:

3.490x10-3 + 1.100x10-2

= 0.01449

0.01449× 10^ 5

= 1449

3 0
3 years ago
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