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
In-s [12.5K]
3 years ago
10

Which reaction is a decomposition reaction? A. 2KClO3 → 2KCl + 3O2 B. 4Na + O2 → 2Na2O C. ZnS + 3O2 → 2ZnO + 2SO2 D. 2NaBr + CaF

2 → 2NaF + CaBr2
Chemistry
1 answer:
Vedmedyk [2.9K]3 years ago
4 0

Answer:

  • <em><u>Option A. </u></em><u><em>2KClO₃ → 2KCl + 3O₂</em></u>

Explanation:

There are five basic general types of chemical reactions:

  • Decomposition reactions
  • Synthesis or combination reaction
  • Single replacement reactions
  • Double replacement reactions
  • Combustion reactions

The given reactions are:

  • <u>2KClO₃ → 2KCl + 3O₂</u>

Which is, indeed, a decomposition reaction because the reactant, KClO₃, is a single substance that undergoes a reaction in which it yields two new substances, known as products: KCl and O₂.

  • <u>4Na + O₂ → 2Na₂O</u> is a synthesis or combination reaction because two reactants, Na and O₂, combine for the formation of one single new product, Na₂O.

  • <u>ZnS + 3 O₂ →  2ZnO + 2SO₂ </u>is a single replacement reaction because oxygen is replacing Zn and S in ZnS to form ZnO and plus SO₂.

  • <u>2NaBr + CaF₂ → 2NaF + CaBr₂ </u>is a double replacement reaction because two  ions (Br⁻ from NaBr and F⁻ from CaF₂) are exchanging places with other two ions (Na⁺ from NaBr and Ca²⁺ from CaF₂) two form two new ionic compounds (NaF and CaBr₂).
You might be interested in
An experiment was set up to test the hypothesis that all plants will grow faster in a "super soil" versus regular potting soil.
dolphi86 [110]

Answer:

add more types of plants

Explanation:are you kidding me i’m doing this stuff and i’m in 7th grade

5 0
4 years ago
When testing a pure substance for its properties, some of the test result in the sample of being changed into another substance.
Deffense [45]

Solubility because when you have to test for it you need to add another liquid to the pure substance and that may cause a chemical change

5 0
3 years ago
You have 2 moles of NaOH how many molecules of NaOH?
kaheart [24]

Answer:

12.044 X 10^23 molecules of NaOH

Explanation:

because NaOH is an ionic bond, we should be asking how many <em>formula units </em> are in 2 moles of NaOH, there are 0 molecules since NaOH is measured in formula units.

but for the sake of the problem I'll assume NaOH is measured in molecules

for every mol of something there are 6.022 X 10^23 of something of that something.

so there are 6.022 X 10^23 molecules for every mol of NaOH

that means we have 2 X 6.022 X 10^23 molecules in 2 moles of NaOH = 12.044 X 10^23 molecules of NaOH

4 0
3 years ago
Please help due today
KiRa [710]
Answer:

neodymium-145
7 0
3 years ago
Similarities between Noble Gases and Alkali Metals?
VashaNatasha [74]

1.they are present in combined state. 2.they form fluoride salts. 3.they are used in lamps.

<span> </span>

3 0
3 years ago
Other questions:
  • The chemical formula for one repeat unit of the PP polymer is CaHe. Produce a balanced chemical equation for the complete combus
    12·1 answer
  • When 1.0 g of solid NaOH (Triangle Hsoln = –445.1 kJ/mol) dissolves in 10 L of water, how much heat is released?
    8·2 answers
  • In this process, a piece of paper with small holes in it separates a heterogeneous mixture by letting through the small particle
    13·1 answer
  • Which statement best describes the electronegativity of an element?
    5·2 answers
  • Which soil would be the best for growing plants?
    7·1 answer
  • I need help balancing both equations?
    8·1 answer
  • Which two columns have identical data? What do these two columns suggest about the identity of elements?
    11·1 answer
  • Kevin is working on a model that shows the positions of Earth, the Moon, and the Sun during the phases of the Moon. How should h
    7·1 answer
  • Which model BEST represents the current view of the solar system?
    14·2 answers
  • If you start with 0.30 m mn2 , at what ph will the free mn2 concentration be equal to 4.6 x 10-11 m?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!