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
atroni [7]
3 years ago
8

What are some observable indications that a chemical reaction has occurred?

Chemistry
1 answer:
Leya [2.2K]3 years ago
8 0
Bubbles, release of gas, change in color, release of a smell, change in temperature, formation of a precipitate, 
You might be interested in
2) Which liberates the most energy?
evablogger [386]

Answer: F(g)+e^-\rightarrow F^-(g)

Explanation:

Electron gain enthalpy is defined as energy released on addition of electron to an isolated gaseous atom.  

The amount of energy released will be maximum when the tendency to attract electrons is maximum. As flourine has atomic number of 9 and has electronic configuration of 2,7. It can readily gain 1 electron to attain stable noble gas configuration and hence liberates maximum energy.

F(g)+e^-\rightarrow F^-(g)

4 0
3 years ago
Which orbital has the lowest energy
GalinKa [24]

Answer:

s orbital

Explanation:

it has the lowest energy because

Paulis law state that orbitals with lower energy must be fill first before that of higher energy

and the s orbital is filled first

5 0
3 years ago
What is the top of a transverse wave
Andru [333]
It would be called the crest.

Happy to help! Have a great evening.

~Brooke❤️
8 0
4 years ago
when a number in scientific notation contains a significant zero, is that zero also significant in the expanded notation? give t
AlexFokin [52]
I believe you are referring zero as the exponent. <span>Any number (except 0) with exponent 0 is defined to mean 1.
</span>

For one thing, there is a rule: 

<span> a^m/ a^m = a^m-m = a^0

</span>But (when a is not equal to <span>0),
</span>
a^m/ a^m = 1

Therefore, we must define a^0 as 1.

4 0
4 years ago
The atomic mass of an element is found by which of the following methods?
Lera25 [3.4K]
On the periodic table it is the number on the bottom of the element. 
<span>If you know the amount of neutrons you can add it to the number of protons to find the atomic mass NUMBER, which is a good approximate of the atomic mass. </span>
8 0
3 years ago
Other questions:
  • Which of these is a compound?<br><br> A. Steel<br><br> B.Sugar<br><br> C.Air<br><br> D.Nitrogen
    15·2 answers
  • The compound Fe2O3 contains how many atoms? <br> A) 2 <br> B) 3 <br> C) 5 <br> D) 7
    11·2 answers
  • Ms. Clark added a spoonful of baking soda and then poured a little vinegar into the cup. We observed fizzing and bubbling. Based
    5·1 answer
  • 1. How many molecules are in 2.40 moles of H2O?
    6·1 answer
  • TUL
    13·1 answer
  • Why Chlorine gas used in ww1
    9·1 answer
  • How many grams of Ba(OH)2 will dissolve in 100g of water at 75 degree Celsius
    7·1 answer
  • What is the molar mass of the anhydrous
    15·2 answers
  • In the reaction represented by the equation 2Al2O3 → 4A1 + 302, calculate the
    6·1 answer
  • True or false: I should write partial charges on any polar bond within a molecule, even if the molecule as a whole is nonpolar
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!