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
Gre4nikov [31]
3 years ago
11

Which of the following does NOT involve a physical change?

Chemistry
1 answer:
levacccp [35]3 years ago
3 0

Answer:

Degradation of matter

Explanation:

Physical change is a temporary change.

You might be interested in
Consider the following unbalanced redox reactions. In each case, separate the whole reactions into half-reactions, balance the h
Marina86 [1]

Answer & Explanation:

(a)

Fe^{2+} +NO_{3}^{-}  => Fe{(OH)}_3 + N_2

reducing agent = Fe²⁺

Oxidizing agent = NO₃⁻

oxidation

Fe²⁺  ⇒ Fe(OH)₃

reduction

NO₃⁻  ⇒ N₂

Oxidation Half Reaction

(<em>redox reactions are balanced by adding appropriate H⁺ and H₂O atoms)</em>

Fe²⁺ ⇒ Fe(OH)₃

Balance O atoms

Fe²⁺ + 3H₂O ⇒ Fe(OH)₃

Balance H atoms

Fe² + 3H₂0 ⇒ Fe(OH)₃ + 3H⁺

balance Charge

Fe² + 3H₂0 ⇒ Fe(OH)₃ + 3H⁺ + e⁻..............(1)

reduction Half Reaction

NO₃⁻ ⇒ N₂

Balance N atoms

2NO₃⁻ ⇒N₂

Balance O atoms by adding appropriate H₂O

2NO₃⁻ ⇒ N₂ + 6H₂O

Balance H atoms

2NO₃⁻ + 12H⁺ ⇒ N₂ + 6H₂O

Balance Charge

2NO₃⁻ + 12H⁺ + 10e⁻⇒ N₂ + 6H₂O.................(2)

Combine Equation (1) and (2)

(1) × 10: 10Fe² + 30H₂0 ⇒ 10Fe(OH)₃ + 30H⁺ + 10e⁻

(2) × 1:   2NO₃⁻ + 12H⁺ + 10e⁻⇒ N₂ + 6H₂O

(1) + (2): 10Fe² + <u><em>30H₂0</em></u> + 2NO₃⁻ + <u><em>12H⁺</em></u> + <u><em>10e⁻</em></u> ⇒10Fe(OH)₃ + <u><em>30H⁺</em></u><u><em> </em></u>+ <em><u>10e⁻</u></em> +              

            N₂ + <u><em>6H₂O</em></u>

            10Fe² + 24H₂0 + 2NO₃⁻  ⇒ 10Fe(OH)₃ + 18H⁺ + N₂

this is the balanced reaction

REDUCTION POTENTIAL

10Fe²⁺(aq) + 10e⁻ ⇒ 10Fe(OH)₃(aq)             E°ox = 10(-0.44) = -4.4V

2NO₃⁻(aq) -  2e⁻ ⇌ N₂(g) + 18H⁺       E°red = 2(+0.80) = +1.6

10Fe² + 24H₂0 + 2NO₃⁻  ⇒ 10Fe(OH)₃ + 18H⁺ + N₂    E°cell = -2.8V

E°cell = E°red + E°ox

4 0
4 years ago
What is the outdoor temperature where you are right now?.
rusak2 [61]

The outdoor temperature, also known as the ambient temperature, is a measure of the amount of heat in the environment and this depends on the kind of environment.

<h3>Temperature</h3>

The outdoor temperature around here is about 33 ^oC.

The temperature in the tropical area, where this area belongs, varies between 27 to 35 ^oC with an annual average of about 28 ^oC.

In order words, tropical regions are generally warm, unlike temperate regions.

Tropical regions also have two distinct seasons, the rainy and the dry seasons. This is unlike temperate regions that have summer, spring, winter, and autumn.

More on temperature can be found here: brainly.com/question/15267055

8 0
3 years ago
Gasoline contains only hydrogen and carbon atoms, yet nitrogen oxide and nitrogen dioxide are produced when gasoline burns. What
White raven [17]

Answer:

The answer to the question is

The source of the nitro- gen and oxygen atoms is from the atmosphere

Explanation:

When gasoline burns oxygen from the atmosphere supports the combustion reaction.

For example the internal combustion engine of a motor vehicle pulls in air from the surrounding atmosphere to make use of the oxygen in aiding the combustion of the gasoline to drive the pistons that ultimately moves the vehicle. The air from which the oxygen is absorbed also contains more amount of Nitrogen by percentage than oxygen. The nitrogen therefore enters into the combustion reaction that eventually produces nitrogen oxide and nitrogen dioxide

7 0
3 years ago
Read 2 more answers
Why is Cl weaker base
Helen [10]
Because cl atoms are bonded with hydrogen. hydrogen bond is very strong bond
6 0
3 years ago
The average flowrate of hydrochloric acid solution from a plant is 11,900 Lt/hr. The density is the same as that of water (1kg/L
skelet666 [1.2K]

Answer:

See explanation.

Explanation:

Hello,

Here, considering the given flowrate, we perform the following units conversions for each case:

(i)

11,900 \frac{L}{h} *\frac{0.264172 gal}{1L} *\frac{1h}{60min} =52.39\frac{gal}{min}

(ii)

11,900 \frac{L}{h} *\frac{1kg}{1L}*\frac{2.20462lbm}{1kg}=26,234\frac{lbm}{h}

(iii)

11,900 \frac{L}{h} *\frac{0.015gmolHCl}{1L}*\frac{1h}{60min}=2.975\frac{gmolHCl}{min}

(iv) We find the kg of HCl per kg of acid solution:

w_{HCl}=0.015\frac{gmolHCl}{Lsln}*\frac{36.45gHCl}{1gmolHCl} *\frac{1kgHCl}{1000gHCl}*\frac{1Lsln}{1kgsln} =5.4675x10^{-4}

(v)

n_{HCl}=0.015\frac{gmolHCl}{L}*\frac{1000L}{1m^3}  *1m^3=15gmolHCl

Best regards.

8 0
3 years ago
Other questions:
  • What is impossible for a machine to do?
    5·1 answer
  • A 0.750-g sample of a compound that might be iron(II) chloride, nickel(II) chloride, or zinc chloride is dissolved in water, and
    8·1 answer
  • If the reactants on the left side of a chemical equation are C3H8 + 5O2, the products in a balanced equation could be
    10·2 answers
  • What is the name of the thermodynamic barrier that must be overcome before products are formed in a spontaneous reaction?
    6·1 answer
  • How are monosaccharides different from disaccharides?
    15·1 answer
  • How might a geologist measure the distance of the earth movement along a fault line from a divergent plate tectonic?
    15·1 answer
  • Balance these equations <br> N2 + O2 &gt; NO
    10·1 answer
  • For the following endothermic reaction at equilibrium: Fe2O3 (s) + 3 H2 (g) 2 Fe(s) + 3 H2O(g) Decide if each of the following c
    7·1 answer
  • PLS HELPP ...All alkali metals react with water to produce hydrogen gas and the corresponding alkali metal hydroxide
    14·1 answer
  • How many moles of KCl are contained in this solution?<br><br>0.486 L of a 2.0 M KCl solution
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!