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Paladinen [302]
3 years ago
11

In a titration, the point at which one drop of base turns the acid indicator a pink color that lasts for 30 seconds is called th

e?
Chemistry
1 answer:
xxTIMURxx [149]3 years ago
8 0
The point at which one drop of base turns the acid indicator into a pink color that lasts for thirty seconds in doing titration is called the end point or the equivalence point.

End point or the equivalence point is the one responsible for the pink color that lasts for thirty seconds.
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Why aren't descriptive investigations repeatable?
Bad White [126]
In descriptive investigations, we still haven't formed any hypothesis yet so we seek information by asking question.

It's not repeatable because repeating the questions over and over again without any clue about what we want to seek is completely waste of time.

Hope this helps xox :)
8 0
3 years ago
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Which parts of LED bulb needs to stay cool as well as which part must transfer energy away from the diode???
storchak [24]

Answer:

every method of removing heat from LED's should be considered. Conduction, convection, and radiation are the three means of heat transfer. Typically, LED's are encapsulated in a transparent resin, which is a poor thermal conductor. Nearly all heat produced is conducted through the back side of the chip. Heat is generated from the PN junction by electrical energy that was not converted to useful light, and conducted to outside ambiance through a long path, from junction to solder point, solder point to board, and board to the heat sink and then to the atmosphere. A typical LED side view and its thermal model are shown in the figures.

Explanation:

6 0
3 years ago
Which questions would help determine whether an article is scientifically accurate?
-BARSIC- [3]
I think it would be:
Is the author stating fact or opinion?
Does the author have evidence for the given facts?

Maybe
How many article has the author written before?

Ones you add if you wanted to is
Does the author give any sources? (Like where they got the info)
3 0
3 years ago
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a compound is found to be 51.38% carbon, 8.64% hydrogen, and 39.97% nitrogen. it has a molecular molar mass of 140,22 g/mol
Vlada [557]

The molecular compound in the given statement is CH₆N₂.

<h3>What defines a molecular compound?</h3>

Chemical compositions of molecules that make up molecular compounds reflect the number of elements that are really bound together within the molecule. Due to the sides and angles of a atoms' links to one another, the complex has a certain structure.

<h3>Briefing:</h3>

Consider 140.22 g/mol of compound

Carbon = 140.22 * 51.38/100

Carbon = 72 gm = 1 mol

Hydrogen = 140.22 * 8.64/100

Hydrogen = 12 gm = 6  mol

Nitrogen  = 140.22 * 39.97/100

Nitrogen  = 56 gm = 2 mol

The molecular compound is CH₆N₂.

To know more about Molecular compound visit:

brainly.com/question/23088724

#SPJ1

The complete question is -

A compound with molar mass 140.22g/mol is known to contain 51.38% carbon, 8.64% hydrogen and 39.97% nitrogen. Find the molecular of this compound.

5 0
11 months ago
Which of the following would be a testable hypothesis for an experiment that compares the health of salmon raised in fish farms
Nookie1986 [14]

If Salmon are raised in a fish farm then they will be healthier since they aren't being exposed to predators or disease.

I'm not fully sure if this is good enough since it seemed like your question had multiple choice but this is generally a testable hypothesis.

7 0
3 years ago
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