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
Lera25 [3.4K]
3 years ago
15

Why is burning not a physical change?

Chemistry
2 answers:
Lerok [7]3 years ago
4 0
I think it might be the last answer.... Or the second one. Yeah i think it’s the second one
SpyIntel [72]3 years ago
4 0
I think it’s the second one
You might be interested in
Bleaching powder was added to excess concentrated hydrochloric acid state whar was observed​
anyanavicka [17]

Answer:

Gas was evolved

Explanation:

The reaction produces chlorine gas which has a pungent smell and is dangerous in excess

6 0
3 years ago
What does graduated mean when talking about cylinders and beakers
Juliette [100K]
Has markings along the cylinder/beaker that indicate the volume of liquid inside them. .
7 0
3 years ago
Data has been collected to show that at a given wavelength in a 1 cm pathlength cell, Beer's Law for the absorbance of Co2 is li
White raven [17]

Answer : The concentration of a solution with an absorbance of 0.420 is, 0.162 M

Explanation :

Using Beer-Lambert's law :

A=\epsilon \times C\times l

As per question, at constant path-length there is a direct relation between absorbance and concentration.

\frac{A_1}{A_2}=\frac{C_1}{C_2}

where,

A = absorbance of solution

C = concentration of solution

l = path length

A_1 = initial absorbance = 0.350

A_2 = final absorbance = 0.420

C_1 = initial concentration = 0.135 M

C_2 = final concentration = ?

Now put all the given value in the above relation, we get:

\frac{0.350}{0.420}=\frac{0.135}{C_2}

C_2=0.162M

Thus, the concentration of a solution with an absorbance of 0.420 is, 0.162 M

4 0
3 years ago
Which statement describes how heat flows from the coffee to the part of the spoon in the coffee?
lozanna [386]

Answer:

Heat flows from the coffee to the spoon through conduction

Explanation: I took did the lab assignment

8 0
3 years ago
Read 2 more answers
1) An unlabeled laboratory solution is found to contain a H+ ion concentration of 1 x 10-4
marishachu [46]

Answer:

C) 1 x 10-10 M

Explanation:

To solve this question we must use the equation:

Kw = [H+] [OH-]

<em>Where Kw is the equilibrium dissociation of water = 1x10-14</em>

<em>[H+] is the molar concentration of hydronium ion = 1x10-4M</em>

<em>[OH-] is the molar concentration of hydroxyl ion</em>

<em />

Replacing:

1x10-14= 1x10-4 [OH-]

<em>[OH-] = 1x10-14 / 1x10-4M</em>

<em>[OH-] = 1x10-10 M</em>

Right option is:

<h3>C) 1 x 10-10 M </h3>

7 0
2 years ago
Other questions:
  • Ben is pushing a small trolley 10 N to the north and but Gary is pushing the trolley 5 N to the south. What is the total applied
    14·1 answer
  • Which of these would DECREASE the solubility of a solid in water?
    7·1 answer
  • This science of classifying organisms is called?
    11·1 answer
  • What is the force of a 10 kg. and its velocity is 2m/s
    5·1 answer
  • What do lactate dehydrogenase, aspartate aminotransfcrase, and creatine kinase all have in common? a. they all are allosteric en
    9·1 answer
  • An reading of 8 on the pH scale is indicative of?
    9·2 answers
  • 2 3 4 5 6 7 8 9 10
    8·1 answer
  • Which of the following are reasons the ocean marine biomes are a challenging place for organisms to live? Choose all that apply.
    8·2 answers
  • Which atom generally obtains a stable configuration by sharing electrons?
    12·2 answers
  • What percentage of incoming college students did not consume any alcohol?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!