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
Ede4ka [16]
3 years ago
5

A firework exploding would be an example of a(n) ________. Question 23 options: Exothermic reaction Endothermic reaction Physica

l change Formation of a precipitate
Chemistry
2 answers:
sesenic [268]3 years ago
8 0

Answer is: Exothermic reaction.

Exploding fireworks is chemical change (chemical reaction), because new substances are formed, the atoms are rearranged and the reaction is followed by an energy change (energy is released).

There are two types of reaction: endothermic reaction (chemical reaction that absorbs more energy than it releases) and exothermic reaction (chemical reaction that releases more energy than it absorbs).

Readme [11.4K]3 years ago
7 0
They are Exothermic reaction





You might be interested in
Ben put 100 ml of water and 100 ml of oil in a beaker then he stirred the mixture. Which is the best way to quickly separate the
RSB [31]

To separate oil from water, add a solution of soluble ionic salt to the solution. Distillation, which involves boiling and condensing the water, is another option, as well as partially freezing the oil and water combination and discarding one-fourth to one-third of the unfrozen water.


4 0
3 years ago
According to the law of conservation of mass, if five atoms of hydrogen are used
Blababa [14]

Answer:

it would be 07

mark  brainlyest

4 0
2 years ago
During a 4 hour trip, a boat sailed 70 km in 2 h. Then the boat did not move for 1 hour and traveled 26 km in the last hour. Wha
Lubov Fominskaja [6]

Answer:

32km/hr

Explanation:

The question asks to calculate the average speed for a boat.

Mathematically, the average speed is the total distance divided by the total time

Let’s get the total distance traveled:

That would be 70km + 26km = 96km

Now the total time taken would be 3 as the boat did not move at all for an hour.

The average speed is thus 96/3 = 32km/hr

7 0
3 years ago
2Li + H2SO4=Li2SO4 + H2 How many liters of hydrogen gas, H2 at STP can be produced from 3.0 moles of Li? The molar volume of a g
Gemiola [76]

Answer:

volume of H_2=33.6 litre

Explanation:

Firstly balance the given chemical equation,

2Li + H_2SO_4=Li_2SO_4 + H_2

From the given balance equation it is clearly that,

2 mole of Li gives  1 mole of H2 gas

2 mole Li⇔1 mole H_2

1 mole Li⇔0.5 mole H_2

3 mole Li⇔1.5 mole H_2

hence

3 mole of Li will give 1.5 mole H2 gas

therefore volume of gas produced from 3 mole Li at STP = 1.5\times22.4 \frac{L}{mol}

volume of H2=33.6 litre

7 0
3 years ago
Is isopropyl alcohol the same as hydrogen peroxide
Gennadij [26K]

Answer:

Unlike isopropanol, hydrogen peroxide is not a type of alcohol. You might recognize its chemical formula, H2O2, as being similar to that of water (H2O). The difference is that hydrogen peroxide has two oxygen atoms instead of one. That one extra oxygen atom makes it a strong oxidizer.

4 0
3 years ago
Other questions:
  • Most atoms form compounds by forming octets in their outer shell. what does octet really mean?
    8·1 answer
  • Butanone draw both enolates formed when the ketone is treated with base. include charges. draw the oxyanion species; do not draw
    5·1 answer
  • Why is potassium sulfate K2SO4, but strontium sulfate SrSO4?
    13·1 answer
  • Calculate the number of grams of HNO3 which must be added to 31.5 g of H20 to prepare a 0.950 m solution.
    15·1 answer
  • The continents of Africa and South America used to "fit together" like puzzle pieces. About how far back in time would you have
    7·1 answer
  • What is an atom? I'll give brainliest.
    5·1 answer
  • Acetylene (C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide (CaC2) reacts with water: CaC
    7·1 answer
  • Igneous rock can _____ to form metamorphic rock.
    12·2 answers
  • 5. What is common among the following phenomena?
    8·1 answer
  • Identify the products and the reactants in the following chemical equations
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!