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
ra1l [238]
3 years ago
9

Colorful fireworks often involve the decomposition of barium nitrate and potassium chlorate and the reaction of the metals magne

sium ,alminium and iron with oxygen.
(a)write the formulas of barium nitrate and potassium chlorate
(b)The decomposition of solid potassium chlorateleads to the formaion of solid potassium chloride and diatomic oxygen gas write an equation for the reaction
(c) The decomposition of the solid barium nitrate leads to the formation of solid barium oxide, nitrogen gas and diatomic oxygen gas
(d)write separate equations for the reactions of the solid Metals in magnesium aluminum with a diatomic oxygen gas to yield the corresponding metal oxide (Assume iron oxide contains Fe+ ions)
Chemistry
1 answer:
Fynjy0 [20]3 years ago
5 0

Fireworks owe their colors to reactions of combustion of the metals present. When Mg and Al burn, they emit a white bright light, whereas iron emits a gold light. Besides metals, oxygen is necesary for the combustion. The decomposition reactions of barium nitrate and potassium chlorate provide this element. At the same time, barium can burn emitting a green light.

(a) Barium nitrate is a <em>salt</em> formed by the <em>cation</em> barium Ba²⁺ and the <em>anion</em> nitrate NO₃⁻. Its formula is Ba(NO₃)₂. Potassium chlorate is a <em>salt</em> formed by the <em>cation</em> potassium K⁺ and the <em>anion</em> chlorate ClO₃⁻. Its formula is KClO₃.

(b) The balanced equation for the decomposition of potassium chloride is:

2KClO₃(s) ⇄ 2KCl(s) + 3O₂(g)

(c)  The balanced equation for the decomposition of barium nitrate is:

Ba(NO₃)₂(s) ⇄ BaO(s) + N₂(g) + 3O₂(g)

(d) The balanced equations of metals with oxygen to form metal oxides are:

  • 2 Mg(s) + O₂(g) ⇄ 2 MgO(s)
  • 4 Al(s) + 3 O₂(g) ⇄ 2 Al₂O₃(s)
  • 4 Fe(s) + 3 O₂(g) ⇄ 2 Fe₂O₃(s)

You might be interested in
Can asteroid be a planet?
aliina [53]

No i think they can not be

5 0
3 years ago
Read 2 more answers
A student was comparing two samples with an equal number of carbon atoms. One sample contained only Carbon-12 atoms. One sample
Diano4ka-milaya [45]

Answer:

3.14

Explanation:

A student was comparing two samples with an equal number of carbon atoms. One sample contained only Carbon-12 atoms. One sample contained only Carbon-14 atoms, which contain two more neutrons than Carbon-12 atoms. The student measured the mass of each sample and testing the reactivity of each sample.

Required:

What would best describe the results of the investigation?

3 0
2 years ago
What will happen to the pH of a buffer if acid/base ratio is increased by 100?
sp2606 [1]

Answer:

It will decrease by 2 units.

Explanation:

The Henderson-Hasselbalch equation for a buffer is

pH = pKa + log(base/acid)

Let's assume your acid has pKa = 5.

(a) If the base: acid ratio is 1:1,

pH(1) = 5 + log(1/1) = 5  + log(1) = 5 + 0 = 5

(b) If the base: acid ratio is 1:100,

pH(2) = 5 + log(1/100) = 5  + log(0.01) = 5 - 2 = 3

(c) Difference

ΔpH = pH(2) - pH(1) = 5 - 3 = -2

If you increase the acid:base ratio to 100:1, the pH will decrease by two units.

4 0
3 years ago
Ultraviolet photoelectron spectroscopy (UPS) is an important analytical tool used to characterize the composition of materials i
Setler [38]

Answer:

The equation for the Kinetic Energy, KE_e, of the photo-emitted electrons is given as follows;

KE_e = h\cdot f- BE

Please find attached the required plot of the kinetic energy versus the frequency

Explanation:

The equation for the Kinetic Energy, KE_e, of the photo-emitted electrons is given as follows;

KE_e = h\cdot f- BE

Where:

h = Planck's constant = 6.63×10⁻³⁴ J·s

f = Frequency

BE = Binding Energy = 2.71 eV  for Calcium metal

f₀ = Threshold frequency for the material

The ionization energy is the energy required to free an electron from an isolated atom

4 0
3 years ago
Which describes the normal boiling point of a substance?
kicyunya [14]

Answer:

I think it's D

Explanation:

I'm so sorry if that's wrong, hope it helps!

6 0
3 years ago
Other questions:
  • How water deposits soil sediment and rock
    8·1 answer
  • C2F4 effuses through a barrier at a rate of 4.6x10-6 mol/hour, while an unknown gas effuses at a rate of 5.8x10-6 mol/hour. What
    15·1 answer
  • 1/2 * m * v ^ 2 = mgh
    14·1 answer
  • Six Carnot engines operating between different hot and cold reservoirs are described below. The heat energy transferred to the g
    13·1 answer
  • Can you use active transport in a sentence
    10·2 answers
  • What is the molar mass of Al2(SO4)3
    5·2 answers
  • Which one are only compounds? *
    11·2 answers
  • Which of the following best describes the kinetic theory?
    12·2 answers
  • ΔU for a van der Waals gas increases by 475 J in an expansion process, and the magnitude of w is 93.0 J.
    13·1 answer
  • Highly permeable soil that is capable of storing water is called a(n)___________.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!