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
Alika [10]
1 year ago
15

What are some signs that a chemical change takes place when a firework explodes?Matter is destroyedLight is producedHeat is prod

ucedThe chemical composition is not changed
Chemistry
2 answers:
dangina [55]1 year ago
7 0

Answer:

Light and heat produced

Explanation:

Ray Of Light [21]1 year ago
5 0
<h2>Answer;</h2>

Light is produced and heat is produced

<h2>Explanations</h2>

Chemical changes occurs when substances react to form new products. This reaction can be in form of a decomposition reaction.

During fireworks explosion, there is a reaction between charge of gunpowder which is been ignited with a fuse to produce a spark that leads to explosion.

The explosion leads to production of light and heat. Hence we can conclude that some signs that a chemical change takes place when a firework explodes is light is produced and heat is produced

You might be interested in
Based on the results you observed for the iodine test and Benedict’s test, is it better to detect enzyme activity by measuring t
dlinn [17]

Answer:

Is better use the Benedict's test by the increase in the amount of the products if the enzyme is a reductase

Explanation:

The Benedict's test works by the reaction of the reducing sugars with the ion cupric of the reactive. If the enzyme is a reductase (degrades polysaccharides into bi o monosaccharides), it should cut the polysaccharide bond and the products would react with the Benedict's cupric ion

I hope you undestand me

3 0
2 years ago
Consider the insoluble compound nickel(II) hydroxide , Ni(OH)2 . The nickel ion also forms a complex with cyanide ions . Write a
natali 33 [55]

Answer: Equilibrium constant for this reaction is 2.8 \times 10^{15}.

Explanation:

Chemical reaction equation for the formation of nickel cyanide complex is as follows.

Ni(OH)_{2}(s) + 4CN^{-}(aq) \rightleftharpoons [Ni(CN)_{4}^{2-}](aq) + 2OH^{-}(aq)

We know that,

      K = K_{f} \times K_{sp}

We are given that, K_{f} = 1.0 \times 10^{31}

and,    K_{sp} = 2.8 \times 10^{-16}

Hence, we will calculate the value of K as follows.

     K = K_{f} \times K_{sp}

     K = (1.0 \times 10^{31}) \times (2.8 \times 10^{-16})

        = 2.8 \times 10^{15}

Thus, we can conclude that equilibrium constant for this reaction is 2.8 \times 10^{15}.

4 0
2 years ago
write down the way you had to behave to illustrate the behavior of particles as a gas condenses to form a liquid
Rainbow [258]

Gases near together and vibrate in position however, don't circulate beyond each other. In a liquid, the particles are interested in every different but now not as a great deal as they may be in a strong.

The particles of a liquid are near together, constantly transferring, and may slide beyond one another. The Kinetic-molecular concept attempts to explain the behavior of fuel molecules based totally on the nature of gasoline. The principle is grounded on  simple assumptions

In gases the debris passes swiftly in all directions, regularly colliding with every different facet of the box. With a boom in temperature, the debris gains kinetic strength and passes more quickly. Gasoline is a state of matter that has no constant form and no fixed extent. Gases have a decreased density than other states of the count, together with solids and liquids. there may be a high-quality deal of empty area between debris, that have loads of kinetic energy and aren't especially drawn to one another.

Learn more about the behavior of particles here:-brainly.com/question/2456191

#SPJ9

3 0
1 year ago
A sample of neon gas occupies a volume of 752 mL at
MatroZZZ [7]

Answer:

815mL am 10000000% sure

7 0
2 years ago
Iron-59 has a half-life of 45.1 days. how old is an iron nail if the fe-59 content is 25% that of a new sample of iron? show all
Yuliya22 [10]
I have attached a paper with the answer. hope you understand. let me know if you have any question

4 0
3 years ago
Read 2 more answers
Other questions:
  • which would have the longer wavelength, a photon with energy of 4.59 x 10^-19 J or a photon with energy of 3.01 x 10^-19 J
    15·1 answer
  • A state religion is referred to as a(n) ________ when the government and religion work together to try to shape society.
    12·1 answer
  • How many moles is 1.25 x 1024 atoms of bromine?
    14·1 answer
  • Suppose an EPA chemist tests a 250.0 ml sample of groundwater known to be contaminated with nickel(II) chloride, which would rea
    8·1 answer
  • What is the mole ratio of water to H3PO4?
    9·1 answer
  • Why do solids expand on heating?
    5·1 answer
  • The force that one surface exerts on another when the two rub against each other is called _
    15·1 answer
  • This diagram is attempting to compare the sizes of the four inner planets. What is wrong with this diagram?
    12·2 answers
  • How many moles of Fe3O4 are required to supply enough iron to prepare 0.472mol Fe2O3 ?
    13·1 answer
  • You have 500,000 atoms of a radioactive substance. After 2 half-lives have past, how many atoms remain?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!