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
drek231 [11]
3 years ago
13

A firecracker exploding would be an example of a (n) ___? A. Physical change B. Exothermic reaction C. Formation of a precipitat

e D. Endothermic reaction
Chemistry
2 answers:
irina [24]3 years ago
5 0
Exothermic because an explosion releases energy, and an exothermic reaction releases heat energy.
Jobisdone [24]3 years ago
3 0
The answer would be A) or the first option.
You might be interested in
True or false an atom is the smallest particle of a whole element
alina1380 [7]
True, as an atom has the same chemical properties as the first bulk element. Dalton’s Atomic Theory explains all :))
5 0
3 years ago
Is the flame coloration a test for the metal or for nitrate ion?
mel-nik [20]

Metallic ion because the metallic ions will enter an exited state and release photons energy, in the form of light, as they return to their ground state.

5 0
3 years ago
Read 2 more answers
which is a type of heat transfer that causes the air at the top floor of a building to be hotter than the bottom floor of a buil
bonufazy [111]

Answer: I believe it's convection

Good luck and I hope this helps!!

8 0
3 years ago
What do cuticles do for land plants that was not necessary for ancestors that lived in water?
Vera_Pavlovna [14]

Answer:

What do cuticles do for land plants that was not necessary for ancestors that lived in water? Cuticles help prevent water loss. ... The next groups of land plants to evolve were ferns, which could grow bigger and taller because they could transport water and food.

Explanation:

8 0
3 years ago
A student is trying to determine the rate law of a chemical reaction. When the initial concentration is varied, the initial reac
boyakko [2]

Answer:

His conclusion is wrong

Explanation:

Now we must know that there are various rate laws.

In a zero order rate law, the rate of reaction is independent of the initial concentration of reactants. Hence varying the initial concentration of the reactants results in no change of the rate of reaction.

In first and second order rate laws, the rate of reaction varies with the concentration of one or two reactants in either case respectively.

Having said these, the student does not need to change the temperature but rather designate the reaction as zero order. The rate of reaction is independent of the initial concentration of reactants.

8 0
2 years ago
Other questions:
  • ) How many molecules are in 23 moles of Sodium?
    9·1 answer
  • Calculate the empirical formula of naproxen (aleve), an over-the-counter pain reliever that has 73.03% c by mass, 6.13% h by mas
    7·1 answer
  • How many moles are there in 990 grams of sugar, C12H22011? (Sig Figs, do not
    13·1 answer
  • The empirical formula of a compound is determined to be CH2O, and its molecular mass is found to be 90.087 g/mol. Determine the
    9·2 answers
  • When will a seed begin to germinate?
    6·2 answers
  • What is Polar and Non-polar Covalent bond ?​
    5·2 answers
  • Which scientist is credited with developing the fist scientific atomic theory
    13·1 answer
  • AP chem. Sublevels!!!!!!!!!!!
    5·1 answer
  • How many grams of oxygen gas occupy 12.3 L of space at 109.4 kPa and 15.4oC?
    9·1 answer
  • Determine the electron-group arrangement, molecular shape, and ideal bond angle(s) for each of the following:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!