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Oksana_A [137]
3 years ago
8

What does a dam generating electricity from water flowing downhill show?

Chemistry
2 answers:
Vlada [557]3 years ago
7 0

Answer:

how systems violate the law of the second law of thermodynamics

Explanation:

i had to take this quiz it is the right answer..

Llana [10]3 years ago
3 0

Answer: the 3 one

Explanation: i just know

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The following properties are either physical or chemical. Which one is different from the rest based on those two categories?
Nadusha1986 [10]

Answer:

Boiling point: physical

Density: physical

Ductility: physical

Heat of combustion: chemical

Explanation:

Chemical properties can only be analyzed by putting the substance through a chemical reaction, such as combustion.

Physical properties can be analyzed without altering the substance chemically. With that in mind:

4 0
4 years ago
Read 2 more answers
The properties of an unknown substance can be compared to the properties of a known substance to identify the unknown substance.
Nitella [24]

Answer:  Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.

Explaination:

By using Physical properties unknown substance can be identified as it involves determination of a substance with out changing their composition or property include color, odor, taste, density, melting point etc.

What are the difference between physical and chemical property ?

Chemical properties can be observed or measured when a substance undergoes any type of changes chemically while Physical properties can be observed without changing anything.

In chemical property, chemical reaction is conducted to show the property of the substance while in physical property No chemical reaction occur.

Chemical properties related to chemical bonds while Physical properties do not have such a relationship.

Chemical properties include radioactivity, toxicity, flammability, heat of combustion,  etc. while physical properties include Molecular weight, boiling point, melting point, freezing point, volume, mass, length, density shape, solubility, etc.

<em>If this helped you please consider marking this as the Brainliest Answer, if i make it to 10, I can be promoted to an expert. How? - Once you get more than 1 answer of a question. A message is shown above each answer that is "Mark as brainiest". Click on the option to mark it the best answer. Thank you!</em>

5 0
1 year ago
Using this equation 2H2+O2–&gt;2H2O when 47g of water are produced, how many grams of hydrogen must react
hoa [83]

You must react 5.3 g H_2 to produce 47 g H_2O.

<em>Step 1</em>. Calculate the <em>moles of H_2O</em>

Moles of H_2O = 47 g H_2O × (1 mol H_2O/18.02 g H_2O) =2.61 mol H_2O

<em>Step 2</em>. Calculate the <em>moles of H_2 </em>

Moles of H_2 = 2.61 mol H_2O × (2mol H_2/2 mol H_2O) = 2.61 mol H_2

<em>Step 3</em>. Calculate the <em>mass of H_2</em>

Mass of H_2 = 2.61 mol H_2 × (2.016 g H_2/1 mol H_2) = 5.3 g H_2

6 0
3 years ago
Why can Marco hear the music, even though he is not in the same room as the speaker?
xeze [42]

Answer:

Sound Travels

Explanation:

Sound waves can travel, and that makes it so that even though Marco is in a different room, he can hear the music. Depending how loud the music is and how thick the walls car, the sound can travel through the walls.

6 0
3 years ago
What is the mass in grams of each of the following samples? 1.505 mol of Ti 0.337 mol of Na
Masja [62]

Answer:

72.04g Ti and 7.75g Na

Explanation:

1.505 mol Ti x (47.87g/1 mol) = 72.04g Ti

0.337 mol Na x (22.99g/1 mol) = 7.75g Na

5 0
3 years ago
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