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
Dmitry_Shevchenko [17]
4 years ago
7

How could the survivors about starting a fire?

Chemistry
1 answer:
joja [24]4 years ago
6 0

Answer:

The ancient Greeks believed that fire was one the four basic elements that composed all things in the universe. In the mythology of virtually every culture, fire is a sacred substance that gives life or power. Fire is not, in fact, a substance. When you gaze at the leaping flames of a campfire, you’re observing not an object, but a process – a chemical reaction. It’s the same chemical reaction that occurs when a cut apple left on the counter turns brown, when silver tarnishes or when an iron nail rusts.

That process is oxidation: combining oxygen with another substance. The defining difference between a fire and your half-eaten apple is speed: fire is an oxidation process that happens very fast, so that light, heat and sound are released — often with enough force and majesty to justify the ancients’ reverence.The sudden release of energy causes temperatures to rise, sometimes by thousands of degrees. And it also results in smoke, the toxic waste of fire’s leftovers.

The fire triangle and the fire tetrahedron

Fire TetrahedronThe fire triangle identifies the three needed components of fire:

fuel (something that will burn)

heat (enough to make the fuel burn)

and air (oxygen)

Explanation: i hope this helps sry its long

You might be interested in
What ionic are compounds used in our daily life?
Gemiola [76]

Answer:

Explanation:

NaCl sodium Chloride as ordinary salt

Naf sodium fluoride is used in toothpaste which we use every day

4 0
3 years ago
Is cycle list Road at an average speed of 15 mph 430 miles how long was the ride
worty [1.4K]
430/15=28\frac{2}{3} hours
4 0
4 years ago
A substance with which bond type would have a high melting point?
DaniilM [7]

Answer:

The answer to your question is A. Ionic

Explanation:

There are 3 kinds of bonds in chemistry

a) Ionic bonds are the bonds between a metal and a nonmetal. Metals lost their electrons and nonmetals gain them. These bonds are the strongest so the melting and boiling points are the highest of all.

b) Covalent bonds are bonds between two nonmetals. The elements share electrons so these bonds are not as stronger as Ionic bonds, the melting and boiling points are high.

c) Metallic bonds are among metals and have high melting and boiling points.

7 0
3 years ago
Favorable (Exergonic) chemical reactions:
artcher [175]

Answer:

Usually give off heat energy

Explanation:

Exergonic reactions are the ones which are spontaneous. Spontaneous reactions are indicated by the negative change in the Gibbs free energy. In order to provide characteristics for an exergonic reaction, we need to define the Gibbs free energy in terms of the enthalpy change and the entropy change:

\Delta G=\Delta H-T\Delta S

Here:

\Delta H is the enthalpy change;

\Delta S is the entropy change;

T is the absolute temperature.

In order to achieve a negative value in the Gibbs free energy change, we should have:

\Delta H - T\Delta S

This is true for all temperatures if:

\Delta H < 0, \Delta S > 0

The major term here is the change in enthalpy, notice that we wish the enthalpy change to be negative.

Negative enthalpy change corresponds to an exothermic reaction, the one which releases heat. This means exergonic reactions would usually give off heat.

4 0
3 years ago
George is writing a newspaper article about the fire at the local library. His introductory paragraph has an example of conserva
Lina20 [59]

Answer:

D

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the mass of khc8h4o4 that reacts with 15 ml of the naoh solution
    9·1 answer
  • My teacher gave this assignment for homework, and I don’t get it. A little help please?
    13·1 answer
  • Draw the partial (valence-level) orbital diagram, and write the symbol, group number, and period number of the element:
    5·1 answer
  • State the law of conservation of mass
    13·1 answer
  • How many moles of nitrogen are in .67 moles of Nitrogen oxide (NO)
    9·1 answer
  • What is the mass of 3.90 moles of magnesium chloride
    15·2 answers
  • What is the solution to the problem expressed to he correct number of significant figures? 12.0/7.11
    15·1 answer
  • How has the world's changing climate today affected glaciers and sea levels
    9·2 answers
  • List the rock layers from oldest to youngest.
    11·2 answers
  • An ionic bond is a bond that forms between
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!