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
Vladimir [108]
3 years ago
11

How can you use evidence to determine if a change is physical or chemical?

Chemistry
1 answer:
Airida [17]3 years ago
4 0

Answer:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Explanation:

You might be interested in
An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. What other characteristic does the radiation
dimulka [17.4K]
The radiation emitted is a beta particle with a -1 charge. Beta particles have a <span>medium penetrating power. An emission of beta particles requires shielding because of the hazards it pose to humans. Thus, one characteristic of this radiation is that <span>some shielding is required.</span></span>
5 0
4 years ago
Read 2 more answers
Tory conducts an experiment to see which of his classmates can run at the greatest speed. He records his data in the table
Ahat [919]

Answer:

The answer is C

Explanation:

I did the study island

6 0
3 years ago
What process is the foundation of almost all food webs
Sergeeva-Olga [200]

Answer:

The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs

3 0
3 years ago
Why is calcium oxide CaO, and not CaO2?
Mandarinka [93]
The Calcium ion is an Alkaline earth metal and wants to give up the 2 s orbital elections and become a +2 cation.

Oxygen has six valence electrons and is looking to gain two electrons to complete the octet (8) electron count in the valence shell making it a -2 anion.

When the charges of the Calcium +2 and the Oxygen -2 are equal and opposite, the ions for an electrical attraction. (Remember Paula Abdul told us "Opposites Attract")

This one to one ratio of charges makes the formula CaO

8 0
3 years ago
Read 2 more answers
When supply and demand for a product increase simultaneously, we can predict that both the market clearing price and the equilib
Whitepunk [10]

Answer: Explanation:

When supply and demand for a product increase simultaneously, we cannot predict the market clearing price, but know that the equilibrium quantity will increase.

NB: We cannot predict the market clearing price because no adequate information such as government policy is provided. such information would likely affect the market clearing price either positively or negatively.

P.S: This is a business question.

3 0
3 years ago
Other questions:
  • How will the addition of water affect the acidity of a highly acidic solution having pH 2?. A) There will be a slight decrease i
    10·1 answer
  • An enzyme that follows Michaelis-Menten kinetics has a KM value of 15.0 μM and a kcat value of 221 s−1. At an initial enzyme con
    14·1 answer
  • What is a paragraph to fit this
    15·1 answer
  • Define the following terms . <br>1. Element <br>2. Mixture <br>3. Compound <br>​
    15·1 answer
  • What are the blanks the missing blanks?
    10·1 answer
  • PLZ HELP ME WITH MY WORK
    14·1 answer
  • Teniendo en cuenta la siguiente reacción quimica: Mn (NO3)2 + NaBiO; + HNO, HMnO₂+ Bi (NO3)3 + NaNO3 + H₂O ¿Cuánto Bi (NO₂), se
    5·1 answer
  • How is a kcal or Calorie different from a calorie?
    7·1 answer
  • Based on the wintertime La Niña weather map, what do you think Florida's temperature and precipitation would be like during a wi
    8·1 answer
  • Which layer of the atmosphere is between the mesosphere and the exosphere?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!