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
cestrela7 [59]
2 years ago
5

What are 3 signs that a chemical reaction is happening, what tells you that this is definitely a chemical reaction?

Chemistry
1 answer:
fgiga [73]2 years ago
3 0

Answer:

A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change

You might be interested in
Which of the following defines the wavelength of a wave? A. the distance between peaks of a wave B. the speed that a wave is pas
Maru [420]

Answer:

D.the wavelength of a wave is the distance between two successive peaks or two successive troughs or a peak and trough

5 0
3 years ago
Read 2 more answers
What grade percentage is developing, proficient, exceeding, and emerging?​
user100 [1]

Answer:

Grade A is the best percentage that is developing, proficient, exceeding, and emerging

5 0
2 years ago
Read 2 more answers
What is the damaging effect of sewage dumps on human health ?
vivado [14]
The sewage dumps were toxic so it would effect the air and cause many help issues especially with lungs.
4 0
3 years ago
Wine has a pH of 3, which means it is __________ times more acidic than tomatoes, which have a pH of 4.
Natasha2012 [34]

Answer:

10

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

Thus, from the formula, more the concentration of the hydrogen ions or more the acidic the solution is, the less is the pH value of the solution.

Thus, solution with pH = 3 will be more acidic than solution with pH =4  

Thus, concentration of the [H⁺] when pH =3

3 = - log [H⁺]

[H⁺] = 10⁻³ M

For pH = 4, [H⁺] = 10⁻⁴ M

<u>hence, pH = 3 is 10 times more acidic than pH = 4</u>

5 0
3 years ago
A solution is prepared by dissolving 51 g of salt in 340 g of
garri49 [273]

Answer:

okķkkkkkkkkkkkkkkkkkkkkk.I don't know the answer. GIVE THANKS

5 0
2 years ago
Other questions:
  • 5000kg of ammonium nitrate per square kilometer of cornfield per year. how much nitric acid would be needed to make the fertiliz
    9·1 answer
  • What is the density of water if you have 50.0 grams of water and a volume of 50.0 millimeters
    14·1 answer
  • Simplified. The absorption spectra of ions have been used to identify the presence of the elements in the atmospheres of the sun
    8·1 answer
  • What are the properties of the aluminum in the can? Check all that apply.
    7·1 answer
  • Of the choices below, which gives the order for first ionization energies? Of the choices below, which gives the order for first
    10·1 answer
  • Which metal is the most reactive with water?<br> A. AI<br> B. Cu<br> C. Fe<br> D. K
    14·1 answer
  • Within a plant, photosynthesis is critical. It provides cells with the glucose they need for
    8·2 answers
  • Difference between atom and ion <br>plz plz answer ​
    8·2 answers
  • A 0.15 M NaOH solution has a volume of 0.125 L but is then diluted to 0.15 L. What is the concentration of the new solution
    11·1 answer
  • Science
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!