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
ElenaW [278]
2 years ago
14

Which of the following is ONE of the signs of a chemical change

Chemistry
2 answers:
Vlada [557]2 years ago
7 0
Which ONE please can you show the signs
pickupchik [31]2 years ago
6 0

Answer:

um i one of what?

Explanation:

You might be interested in
A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scien
pshichka [43]

Answer:

not valid

Explanation:

Expert judgment is a useful validation method to verify the reliability of an investigation that is defined as “an informed opinion of people with experience in the subject, who are recognized by others as qualified experts in it, and who can give information, evidence, judgments and assessments ”

After submitting an instrument for comparison to the consultation and expert opinion, it must meet two quality criteria: validity and reliability. The validity of content is often established based on two situations, one that concerns the design of a test and the other, the validation of an instrument subject to translation and standardization procedures to adapt it to different cultural meanings. It is here that the task of the expert becomes a fundamental task to eliminate irrelevant aspects, incorporate those that are essential and / or modify those that require it.

5 0
3 years ago
Calcium is added to water,the liberated gas is<br>​
vlabodo [156]

Answer:

In both cases, the gas evolved is H2. When calcium reacts with water the heat evolved is not suffcient for hydrogen to catch fire. On the other hand, sodium metal reacts with water violently and in this case a lot of heat is evolved which is sufficient for hydrogen to catch fire.

Explanation:

may this answer is helpful for you

4 0
2 years ago
Read 2 more answers
1. Dissolve 1 teaspoon of Epsom salts in a half cup of water.
andreyandreev [35.5K]
<span>1. The balanced equation for the reaction between magnesium sulfate and ammonia is MgSO4 + 2NH4OH → (NH4)2SO4 + Mg(OH)2
2. The reaction between magnesium sulfate and ammonia is double displacement.</span>
7 0
3 years ago
Read 2 more answers
Jose wandered 4 kilometers at 2 kilometers per hour. How long did jose wnader?
Anton [14]
8 kilometer? is that right or explain to me pls.
7 0
2 years ago
Arrange the elements in order of increasing atomic size: Li, N, B
alexgriva [62]

Answer:

N, B, Ni

Explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • Cci(4) will be soluble in
    12·1 answer
  • Complete this equation for the dissociation of na2co3(aq). omit water from the equation because it is understood to be present.
    12·2 answers
  • Please put in order from LARGEST WAVELENGH TO SHORTEST YOU WILL GET BRAINLIEST AND 25 POINTS START FROM TOP TO BUTTON
    12·1 answer
  • Which element is in the same period as chlorine (Cl) ?
    8·1 answer
  • What is the % of each element in Ni3{PO4) 2 ?​
    6·1 answer
  • Draw all four products obtained when 2-ethyl-3-methyl-1,3-cyclohexadiene is treated with HBr at room temperature and show the me
    10·1 answer
  • How many atoms are in 175.8 grams of Hg?
    6·1 answer
  • What do you call the movement of the earth's surface to the atmosphere?
    6·1 answer
  • D‑Glucose and L‑glucose are
    13·2 answers
  • Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!