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djyliett [7]
2 years ago
8

In humans, these organs are part of a larger system, the ________ system.

Chemistry
1 answer:
Korolek [52]2 years ago
4 0

Answer:

Is there any options?

For example :

1) Nervous system

2)....

3)...

and so on.

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What important points do you need to remember about combustion?
goldenfox [79]

Explanation:

A substance burning in the presence of oxygen and leads to the formation of heat and light is called combustion.

Some important points about combustion are as follows:

  • Fuel should be present for burning.
  • Air should be present for the supply of oxygen.
  • There should be heat (or ignition temperature) to initiate the chemical reaction.
7 0
3 years ago
Which type of reaction is Pb(NO3)2 + 2HCl → PbCl2 + 2HNO3?
Ganezh [65]

Answer:- D. Double- replacement reaction

Explanations:- In general, the decomposition reactions looks like:

AB\rightarrow A+B

The given reaction looks different than this and so it is not decomposition reaction.

A single-replacement reaction looks like:

AB+C\rightarrow AC+B

Our reaction looks different from this so single-replacement is also not correct.

Synthesis reaction looks exactly opposite to decomposition reaction.

A+B\rightarrow AB

The given reaction is different than this and so it is not synthesis reaction also.

A double-replacement reaction looks like:

AB+CD\rightarrow AD+CB

In this reaction, the ions are exchanged as could be seen in the general reaction. On reaction side,A is with B and C is with D. On product side, A is with D and C is with B.

The same is happening in the given reaction. Nitrate ion is with lead metal on reactant side and chlorine is with hydrogen, On product side, Chlorine is with lead metal and nitrate ion is with hydrogen. So, ion exchange has taken place here and so this is a double-replacement reaction and choice D is correct.

4 0
3 years ago
A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. the energy released from the acetylene fue
Sveta_85 [38]

A welding torch produces a flame by burning of acetylene fuel then energy released from the acetylene fuel is then used to melt a metal, so transformation of chemical energy into thermal energy takes place.

<h3>What is transfer of energy?</h3>

Energy neither can be produced nor destroyed but it only transfers from one form to other form.

In the question it is given that, burning of acetylene produces energy and this produced energy is a type of chemical energy and then this is used as a thermal energy for the melting of metal.

So conversion of kinetic energy to potential energy, thermal energy to electromagnetic energy and potential energy to chemical is wrong.

Hence transformation of chemical energy into thermal energy takes place.

To know more about transformation of energy, visit the below link:

brainly.com/question/14754310

4 0
2 years ago
The pressure in an engine cylinder increases from 7.6 atm to 13 atm as the gas is compressed from 0.50 L to 0.10 L. What is the
REY [17]
T k = 15 + 273 = 288 K

4.6 / 13 => 0.353 atm

0.50 / 0.10 => 5 L

<span>(15 + 273) K x (13 atm / 7.6 atm) x (0.50 L / 0.10 L) 
</span>
<span>= </span>2463.15 K

<span>hope this helps!</span>
8 0
3 years ago
Read 2 more answers
The energy and wavelength of a wave are ____. A.Unrelated B.Equal C.Inversely proportional D.Directly proportional
maxonik [38]

Answer:

b. equal

Explanation:

8 0
3 years ago
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