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
solniwko [45]
4 years ago
14

Why can't chemical changes be undone? Because of the chemical properties. Because Mark is an idiot. Because they need energy. Be

cause new substances are formed.
Chemistry
1 answer:
Volgvan4 years ago
8 0

Answer: Because new substances are formed.

Explanation: A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.  Once a chemical change occurs it cannot be undone due to the change in chemical identity.  The creation of a new substance is not reversible.  

You might be interested in
Pl help me, i need a good grade on this.
Blizzard [7]
1. Option A. Temperature and Salinity
2. Option D. (I think)
3. Option D.
Hope your test goes well!
8 0
3 years ago
Equal masses (in grams) of hydrogen gas and oxygen gas are reacted to form water. Which substance is limiting?
Sonbull [250]

Answer:

a. Oxygen gas is limiting

Explanation:

hydrogen gas and oxygen gas are reacted to form water

2H₂ + O₂  →  2H₂O

the above balanced equation shows that 2 moles of H₂ is required for 1 mole of O₂

Given equal masses of H₂ and O₂

assuming 'x' gm for each, no. of moles of each gas  =

no. of moles of H₂ = x/2 = 0.5x moles

no.of moles of O₂ = x/32 = 0.031x moles

This shows that no. of moles of O₂ is very less so O₂ will become the limiting reagent.

3 0
4 years ago
Read 2 more answers
PLEASE ANSWER THIS QUESTION ASAP.
Natali5045456 [20]
Equal is the answer

Hope this helps
6 0
3 years ago
Read 2 more answers
Which example provides a complete scientific description of an object in motion? Question 3 options: The marble changed position
Contact [7]
The answer is the Car Traveling North... According to me
3 0
3 years ago
Read 2 more answers
True or false? Molecules are made of atoms of one type
Olegator [25]

Answer:

false

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • A breeder reactor can be used to produce electricity by fission.
    15·1 answer
  • What's is the difference between relative abundance vs percent abundance
    9·1 answer
  • Carbon Monoxide reacts with steam to produce carbon dioxide and hydrogen. At 700K, the equilibrium constant is 5.10. Calculate t
    5·1 answer
  • Use the periodic table to find the molar mass of each of the following elements. Sodium (Na): g/mol Oxygen (O): g/mol Carbon (C)
    10·2 answers
  • What is a material which cannot be broken down or changed into another substance using chemical matters?
    13·1 answer
  • An acid with a p K a of 8.0 is present in a solution with a pH of 6.0. What is the ratio of the protonated to the deprotonated f
    9·1 answer
  • What is the molar mass of Au2S
    11·2 answers
  • What is particles in chemistry?
    13·1 answer
  • Need help due in 10 mins
    12·1 answer
  • Tell me the main parts of the Earth Layers.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!