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Fiesta28 [93]
3 years ago
12

4 Weathering Assessment

Chemistry
1 answer:
Leni [432]3 years ago
6 0

Answer:

This is an example of a physical change because the ice cubes began to melt.

This is an example of a physical change because the ice cubes began to melt.

Explanation:

The above is the right answer to the question about the dissolution of the whole mixture mentioned in the excerpts above.

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Shani poses as the Statue of Liberty for an art class. She holds a torch above her head with her right hand and a book against h
uysha [10]

Answer:

She did no work while she posed because she did not move the torch or the book.

Explanation:

6 0
2 years ago
Read 2 more answers
What volume in milliters would give 12.0 grams of NaOH from a 2.0 M NaOH solution?
zavuch27 [327]

Answer:

V = 150 mL

Explanation:

Hello!

In this case, since the molarity of a solution is computed via:

M=\frac{n}{V}

Whereas we are asked to compute the volume:

V=\frac{n}{M}

Thus, we first compute the moles in 12.0 g of NaOH as its molar mass is about 40.0 g/mol:

n=\frac{12.0g}{40.0g/mol}=0.3mol

Thus, at first instance, the volume liters is:

V=\frac{0.3mol}{2.0mol/L} \\\\V=0.15L

Which in milliliters is:

V=0.15L*\frac{1000mL}{1L}\\\\V=150mL

Best regards!

5 0
3 years ago
Which best describes a scientist who solves a new problem using something already learned?
adelina 88 [10]

Answer:

The answer should be Skeptical

6 0
3 years ago
Select the correct image.
katovenus [111]
The first one looks right
4 0
2 years ago
1. Identify each of the following changes as endothermic, exothermic, or not possible to tell. The matter to keep in perspective
goldenfox [79]

Answer:

When effervescent antacid tablets are dropped into water, the tablets slowly disappear and the water becomes fizzy- endothermic

On a hot day, water vapor condenses out of the air and turns into liquid droplets on the outside of a cold glass of lemonade- exothermic

The copper on the Statue of Liberty oxidizes and turns blue.- endothermic

Explanation:

An exothermic reaction is a reaction in which heat is given out to the surrounding. The temperature of the system increases when an exothermic reaction occurs. An endothermic reaction occurs when heat is absorbed and the temperature of the system decreases. Oxidation of elements and effervescence of antacid solution are endothermic processes.

Given that the water vapour in air losses energy upon condensation to liquid, the process is exothermic

7 0
3 years ago
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