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
sweet-ann [11.9K]
3 years ago
10

Which of the following changes are classified as physical changes?

Chemistry
1 answer:
ale4655 [162]3 years ago
7 0
A i think............................
You might be interested in
2H2 +O2 = 2H2O balance equation with 5 oxygen
Ivenika [448]

10H₂    +   5O₂ →    10H₂O

Explanation:

This problem deals with balancing of chemical equations. In balancing chemical equations, the law of conservation of mass must be followed. This states that:

   "In a chemical reaction, matter is neither created nor destroyed but transformed from one form to another".

This meaning of this is that; the number of atoms on each side of the expression must be the same.

                    2H₂    +   O₂ →    2H₂O

let us check is the equation above is balanced;

   

                                      2H₂    +   O₂ →    2H₂O

Elements             reactant                product

H                                  4                           4

O                                   2                           2

We can see vividly that the equation is balanced;

Now; if we have 5 oxygen gas, we multiply the equation through by 5:

 

                                 5 x          (  2H₂    +   O₂ →    2H₂O   )

     ⇒        10H₂    +   5O₂ →    10H₂O

Elements             reactant                product

H                                  20                       20

O                                  10                        10

learn more:

Balanced equation brainly.com/question/11102790

#learnwithBrainly

5 0
4 years ago
I need help with this question
KiRa [710]
A challenge they could face is that the plants are not used to the climate in the new area . (sorry if it’s wrong)
5 0
3 years ago
What is the chemical formula of sodium carbonate?
Gekata [30.6K]

Answer:

Na2CO3 is the formula for sodium carbornate

6 0
3 years ago
Which of these statements correctly describes covalent bonds?
Goshia [24]
The most appropriate answer is B !!

Covalent bond is formed by sharing of electrons !!
8 0
3 years ago
Read 2 more answers
Which of the following breaks and forms bonds?
svp [43]
Your answer would be "Chemical Change"
7 0
3 years ago
Other questions:
  • How temperature affects reaction rate
    10·2 answers
  • Which of these performs the same function as the gasoline in a car
    15·2 answers
  • How many atoms of carbon are represented in 3CH3CH2O?<br><br> 2<br><br> 4<br><br> 6<br><br> 8
    7·1 answer
  • What’s a more accurate way to describe electron orbitals?
    14·1 answer
  • Which happens when a reversible reaction reaches a state of chemical equilibrium?
    15·1 answer
  • How do valence electrons affect the properties of atoms?
    11·1 answer
  • What happens to the molecules as water freezes? A. The water molecules stop moving B. The water molecules move faster C. The wat
    6·1 answer
  • If you have 2.0 moles of sodium chloride (NaCl), what is its mass in grams?
    8·1 answer
  • Name 3 parts of an atom
    12·1 answer
  • 1.A space shuttle's wings are useless as it travels around the exosphere. Explain, in your own words, why the wings are so usele
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!