In the number 48.93, which digit is estimated?

Chemistry

1 answer:

Fudgin [204]3 years ago

7 0

The answer is 3.

Explanation:
It’s the last number and it can’t be 9 because then it would be 48.9 and no 3.

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(h) The student made observations related to the contents of the Erlenmeyer flask during the titration. Identify an observation

katen-ka-za [31]

Answer:

Explanation:

During titration indicators are often used to identify chemical changes between reacting species.

For colorless solutions in which no noticeable changes can easily be seen, indicators are the best bet. Most titration processes involves a combination of acids and bases to an end point.

Indicators are substances whose color changes to signal the end of an acid-base reaction. Examples are methyl orange, methyl red, phenolphthalein, litmus, cresol red, cresol green, alizarin R3, bromothymol blue and congo red.

Most of these indicators have various colors when chemical changes occur.

Also, there are heat changes that accompanies most of these reactions. These are also indicators of chemical changes.

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3 years ago

Mr. Jones, the science teacher, tells his students that energy cannot be created; it must be captured from the environment. He i

taurus [48]

The law of conservation of energy or first law of thermodynamics

Explanation:

From the context we can infer that Mr. Jones was describing the law of conservation of energy.

According to the law of conservation of energy:

"energy is not created nor destroyed by can be transformed from one form to another" .

The captured energy is a form of energy and it is change into other forms in the ecosystem.