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3 years ago

PLEASEEEEEEEEEEE HELP WILL MARK BRAINLIEST!!!!!!!!!!!

Chemistry

2 answers:

slamgirl [31]3 years ago

7 0

Answer:

The correct statement is that Example A describes a chemical change and Example B describes a physical change.

Explanation:

In example A we have a chemical change because the use of soaps and detergents implies a chemical reaction called saponification due to the soap molecules has a double component the first part of a soap is called hydrophilic and the second part is called hydrophobic. so, when the soap molecules interact with the oil molecules in water the hydrophilic part will be bonded with water and the hydrophobic part will be bonded with the oil. This new bondings are called micelles and the formations of micelles by new bonds it is a chemical change.
In example B there is a physical change because the water in a Bowl is evaporated. it means that at higher temperatures the molecules of water pass from the liquid state of the matter to the gas state. This physical change happens after the water molecules reach enough energy able to broke surface tension in liquid water. This energy is obtained thanks to the increasing of temperature, and the temperature needed to achieve this change from liquid to gas is called boiling point.

Sidana [21]3 years ago

3 0

Example A describes a chemical change and Example B describes a physical change.

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Which five statements about hemoglobin and myoglobin structure are true? Each iron atom can form six coordination bonds. One of

Ulleksa [173]

Answer:

Here's what I get

Explanation:

Each iron atom can form six coordination bonds. One of these bonds is formed between iron and oxygen.

TRUE

By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom.

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3 years ago

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viva [34]

Answer:

H+AQ=POP

Explanation:

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aluminum has a density or 2.7g/cm3. copper has a density of 8.96/cm3. which metal would you choose to build a model airplane?

erik [133]

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3 years ago

When you have finished adding the necessary amount of NaOH to your beaker, what color will the litmus paper turn?

Svetllana [295]

Answer: The red litmus paper turns blue on dipping in NaOH solution.

Explanation:

Litmus paper is the indicator that detects the nature of the solution, whether it is acidic or basic.

There are 2 types of litmus paper:

Red litmus paper: This paper will turn blue if it is dipped in basic solution and will remain as such if it is dipped in acidic solution.
Blue litmus paper: This paper will turn red if it is dipped in acidic solution and will remain as such if it is dipped in basic solution.

NaOH is a strong base, so when a red litmus paper is dipped in the beaker having necessary amount of NaOH, the red litmus paper turns into blue.

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3 years ago