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Alex_Xolod [135]
3 years ago
11

The answer to #11 and why that's the correct answer

Chemistry
1 answer:
defon3 years ago
7 0
The answer is A: 0.227 mol.

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URGENT PLEASEEEE, WILL GIVE 100 POINTS
Amanda [17]

Let's balance

  • 2N_2O+3O_2---->4NO_2

Moles of laughing gas

  • 9/44
  • 0.2mol

2 moles need 3 mol O_2

1 mol needs= 1.5mol O_2

moles of O_2.

  • 1.5(0.2)
  • 0.3mol

#2

  • 3 molO_2 produces 4 mol smog
  • 1 mol produces 4/3=1.3mol smog

Moles Of O_2

  • 7.5/32
  • 0.2mol

Moles of smog

  • 1.3(0.2)=0.26mol

Mass

  • 0.26(46)
  • 11.96g
3 0
2 years ago
Read 2 more answers
What is an example of adding energy to a substance and causing a physical change?A.heating a rock to make it hotB.warming ice to
mixer [17]

Answer: B. warming ice to produce water

Explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.  Example: Melting of ice

A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions. Example: Corrosion of iron called as rusting.

Endothermic reactions are those in which heat is absorbed by the system and exothermic reactions are those in which heat is released by the system.

A. heating a rock to make it hot : It requires addition of energy and does not involve any change.

B. warming ice to produce water :  It requires addition of energy and is a physical change

C. igniting a hydrogen-filled balloon: It needs energy and is a chemical change

D. burning paper to produce CO_2 and carbon : It releases energy and is a chemical change

4 0
3 years ago
Specific heat is defined as the amount of heat in what
GenaCL600 [577]

Answer:

Specific heat is the amount of energy that must be added, in the form of heat, to one unit of mass of the substance in order to cause an increase of one unit in temperature.

Explanation:

8 0
3 years ago
Read 2 more answers
Circle the correct one from given alternatives.
mash [69]

Answer:

24 is the correct anwer

this the anwer text this u no

3 0
2 years ago
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Which compound can be used to preserve biological specimens? A central C is double bonded to an O, and single bonded to 2 H. A c
Darina [25.2K]

Answer:

A central C is double bonded to an O, and single bonded to 2 H

Explanation:

Methanal, also known as formaldehyde, is a chemical compound used to preserve dead biological specimens for further study. It is called formalin when in a solution and it helps keep specimens in a fresh state by hardening the tissues of the specimen involved.

Formaldehyde is a gaseous compound that has an aldehyde functional group i.e. -CHO and has a chemical formula, H-CHO or CH2O as described in the question that a central C is double bonded to an O, and single bonded to 2 H (see attached image for structural formula).

4 0
4 years ago
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