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
SpyIntel [72]
3 years ago
13

Why is burning wood a chemical change?

Chemistry
1 answer:
Nitella [24]3 years ago
3 0
There are 4 things that are evidence of a chemical change.
1)Change in color
2)Change in shape (gas being let out)
3)Change in temperature
4)Change in smell

Burning wood is a chemical change because it has a change in color, and shape.
You might be interested in
34 points please help!!!!!!!!
Shtirlitz [24]

Answer:

(i think) it is A difference in 1 unit is a 10X difference in concentration For example; a liquid with pH of 3 is 10X more acidic than a liquid with a pH of 4. Therefore, a liquid with a pH of 3 is stronger.

Explanation:

8 0
3 years ago
Can you guys help me.
Alisiya [41]
<span>1. Formula 2. Reactants 3. Atoms & molecules 4. Destroyed or created 5. Balanced 6. Mass number 7. 2Al(s) + 3CuCl2(aq) = 2AlCl3(aq) + 3Cu(s)</span>
5 0
3 years ago
At a particular temperature, K = 4.1 ✕ 10−6 for the following reaction. 2 CO2(g) 2 CO(g) + O2(g) If 2.3 moles of CO2 is initiall
mestny [16]

Answer:

concentration of [O_2] = 0.0124 = 12.4 ×10⁻³ M

concentration of [CO] = 0.0248 = 2.48 ×10⁻² M

concentration of [CO_2] = 0.4442 M

Explanation:

Equation for the reaction:

2CO_2_{(g)                ⇄          2CO_{(g)       +       O_2_{(g)

Concentration of   CO_2_{(g) = \frac{2.3}{4.9}  = 0.469

For our ICE Table; we have:

                       2CO_2_{(g)                ⇄          2CO_{(g)       +       O_2_{(g)

Initial                 0.469                              0                           0

Change              - 2x                                +2x                      +x

Equilibrium       (0.469-2x)                       2x                         x

K = \frac{[CO]^2[O]}{[CO_2]^2}

K = \frac{[2x]^2[x]}{[0.469-2x]^2}

4.1*10^{-6}=\frac{2x^3}{(0.469-2x)^2}

Since the value pf K is very small, only little small of  reactant goes into product; so (0.469-2x)² = (0.469)²

4.1*10^{-6} = \frac{2x^3}{(0.938)}

2x^3 =3.8458*10^{-6

x^3 =\frac{3.8458*10^{-6}}{2}

x^3=1.9229*10^{-6

x=\sqrt[3]{1.9929*10^{-6}}

x = 0.0124

∴ at equilibrium; concentration of  [O_2] = 0.0124 = 12.4 ×10⁻³ M

concentration of [CO] = 2x  = 2 ( 0.0124)

= 0.0248

= 2.48 ×10⁻² M

concentration of [CO_2] = 0.469-2x

= 0.469-2(0.0124)

= 0.469 - 0.0248

= 0.4442 M

3 0
3 years ago
Draw a line graph showing the population of beetles and healthy trees in the forest for five years. Round the numbers to the nea
Sergio [31]

how do i draw a line ghraph on a computer

8 0
3 years ago
Read 2 more answers
Consider the following reaction at equilibrium. What effect will adding some C have on the system?CO2(g) + C(graphite) ↔ 2 CO(g)
sashaice [31]

Answer:

No effect will be observed since C is not included in the equilibrium expression.

Explanation:

Let's consider the following reaction.

CO₂(g) + C(graphite) ↔ 2 CO(g)

The equilibrium constant (Kc) is the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients.

Kc only includes gases and aqueous species (not liquids or solids).

Kc=\frac{[CO]^{2}}{[CO_{2}]}

As we can see, C is a solid and is not included in the equilibrium expression, so adding some C would have no effect on it.

4 0
3 years ago
Other questions:
  • Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed
    15·1 answer
  • The addition of hydrochloric acid to a silver nitrate solution precipitates silver chloride according to the reaction:
    15·1 answer
  • Lucy needs to lift a crate to a shelf 20 m high. She does 12,000 J of work on a machine to help her. The machine exerts a force
    5·1 answer
  • Significant figures<br> 5.3316 + 6.87 + 37.48
    13·2 answers
  • What is the term for a ratio of equivalent measurements that can be used to change a value from one until into another
    11·1 answer
  • There are many important laws and theories in science. Which of the following is a law of science?
    13·2 answers
  • 2. Show the molecular formula and electron structure of the simplest compound that forms with only carbon and hydrogen atoms. (1
    10·1 answer
  • What happens to the temperature and density of the material between points B and C?
    14·1 answer
  • Write a scientific explanation of conduction.
    8·2 answers
  • A sample of a food label is shown below.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!