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2 years ago

What is physical weathering NOT caused by? (pls i really need help with this!!)

Chemistry

1 answer:

Anarel [89]2 years ago

3 0

Answer:

the changing tempure in rocks causing it to back apart

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What are the five steps of the scientific method in order from first to last? A:observation, problem, hypothesis, project experi

lara [203]

Answer:

he scientific method has five basic steps, plus one feedback step:

Make an observation.

Ask a question.

Form a hypothesis, or testable explanation.

Make a prediction based on the hypothesis.

Test the prediction.

Iterate: use the results to make new hypotheses or predictions.

Explanation:

I think A.

7 0

3 years ago

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50 ml of 0.2 M acetic acid is shaken with 10 g activated charcoal. The concentration of acetic acid is reduced to 0.5 times the

Olegator [25]

Answer:

$0.03 g_{acid}/g_{charcoal}$

Explanation:

The amount adsorbed (solute) is the acetic acid, and the adsorbent is the activated charcoal. The mass of the adsorbent is 10 g.

So, we need to calculate the mass of the acetic acid as follows:

$m = n*M = C*V*M$

Where:

n: is the number of moles = C*V

M: is the molecular mass = 60.052 g/mol

C: is the final concentration of the acid = 0.5*0.2 mol/L = 0.10 mol/L

V: is the volume = 50 ml = 0.050 L

$m_{acid} = C*V*M = 0.10 mol/L*0.050 L*60.052 g/mol = 0.30 g$

Now, the amount of solute adsorbed per gram of the adsorbent is:

$\frac{m_{acid}}{m_{charcoal}} = \frac{0.30 g}{10 g} = 0.03 g_{acid}/g_{charcoal}$

Therefore, the amount of solute adsorbed per gram of the adsorbent is 0.03 g/g.

I hope it helps you!

3 0

2 years ago

This is a group on elements with properties of both a metal and a nonmetal. Example: silicon, antimony, also known as a metalloi

tiny-mole [99]

These are metalloids. :)

8 0

3 years ago

An inference _______.

ryzh [129]

Answer:

Explanation:

Am Inference is an educated guess, or a guess using prior knowledge

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2 years ago

Fission of U-235 can produce: krypton strontium barium xeonon all of the above

nexus9112 [7]

The U-235 fission will produce krypton-92 and barium-141. And this process will also release huge amount energy. And U-235 also go through α decay model.

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3 years ago

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