1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nady [450]
2 years ago
8

1. A fire is heating up a pot, which is cooking food. Which part of this reaction is the chemical reaction system?

Chemistry
1 answer:
galben [10]2 years ago
7 0

2. When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.

3. A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.

4. Energy is never created but simple recycled and changed into other forms.

You might be interested in
11.9 g Cl2 is reacted with 10.7 g NaOH. How many moles of NaCl are produced?
melisa1 [442]

Answer:

1. 7.256g of NaCl

2. 47.33g of Cl2

Explanation:

2 moles of Na reacts to produce 2 moles of NaCl

8 moles of Na will still produce 8 moles of NaCl

Mass of NaCl = molar mass of Nacl/moles of Nacl

=58.5/8

=7.256g of NaCl

From the equation, 2 moles of Na reacts with 1 mole of Cl2

3/2 moles of Cl2 will react with 3 moles of Na

Mass of Cl2 = 71/1.5

=47.33g of Cl2

Explanation:

4 0
3 years ago
A scientist finds that one volume of an unknown gas X combines with two volumes of another gas Y to form two volumes of a new ga
MariettaO [177]

Answer:

Gas X

Explanation:

The given reaction can be written in the form of chemical equation as shown below as:

X+2Y\rightarrow 2XY_2

According to law of conservation of mass, the moles of each substance in the reaction must be equal on both reactant and product side.

Also, the question asks for the gas which is diatomic. XY_2 cannot be diatomic as the formula contains 3 atoms.

Between gas X and gas Y , <u>X has to be diatomic for the reaction to balance </u>as:

X_2+2Y\rightarrow 2XY_2

3 0
4 years ago
Help me please thanks
Evgesh-ka [11]

Then answer would be D. Answer D is correct because you would need to use a better solvent to see the ink separate on the chromatography paper. Hope that helps. :)

6 0
3 years ago
The density of liquid oxygen at its boiling point is 1.14 kg/L , and its heat of vaporization is 213 kJ/kg . How much energy in
-Dominant- [34]
<span>2.28 kg x 213 kJ/kg = 486 kJ = 4.86E+05 J</span>
5 0
3 years ago
Is sublimation exothermic or endothermic
Masja [62]

Answer:

endormic

Explanation:

It occurs at a temperature and pressures below a substance's triple point on its phase diagram, which corresponds to the lowest pressure at which the substance can exist as a liquid

5 0
3 years ago
Other questions:
  • What is the atomic mass of gold rounded to the nearest whole number
    10·2 answers
  • Water (3030 g ) is heated until it just begins to boil. If the water absorbs 5.49×105 J of heat in the process, what was the ini
    10·1 answer
  • When starch is broken down it becomes _________.
    8·2 answers
  • Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below.
    11·2 answers
  • Explain the difference between the bohr model and the electron cloud model
    11·1 answer
  • A saturated solution of copper (II) hydroxide is prepared in a beaker by adding the solid to water and stirring. When the soluti
    6·1 answer
  • How many moles are there in 3.612 x 1024 atoms of Sulfur?
    8·1 answer
  • Which of the following would be a clue that a rock is sedimentary?​
    15·2 answers
  • It is possible for an object’s weight to change while it’s mass remains constant?Explain.
    10·1 answer
  • What are all the ways that you think knowing about the flow of energy might be useful in
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!