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
dlinn [17]
3 years ago
12

Which evidence is an indication that a chemical reaction has occured

Chemistry
2 answers:
Norma-Jean [14]3 years ago
4 0

Answer:

color change

Explanation:

Zolol [24]3 years ago
3 0
Answer:

There are three main indications when a chemical reaction occurs.

1. Energy change.

2. Color change.

3. Formation of new substance, which is the most suitable indication of a chemical change.
You might be interested in
Which of the following best describes where cellular respiration occurs?
Illusion [34]

Answer:

In every body cell

Explanation:

4 0
3 years ago
Read 2 more answers
The chemical formula for oxygen difluoride is O2F true or false?
Dahasolnce [82]

Answer:

false

Explanation:

5 0
3 years ago
Read 2 more answers
3. Oblicz stężenie procentowe 423 g roztworu zawierającego 17 g rozpuszczonego siarczanu (VI) miedzi (II). Zapisz obliczenia i o
goldfiish [28.3K]

Answer:

17 / 423 = 0.04018912529

~ 4%

proszę bardzo

6 0
3 years ago
Based on the ideal gas law, there is a simple equivalency that exists between the amount of gas and the volume it occupies. at s
nordsb [41]
<span>2.10 grams. The balanced equation for the reaction is CO + 2H2 ==> CH3OH The key thing to take from this equation is that it takes 2 hydrogen molecules per carbon monoxide molecule for this reaction. And since we've been given an equal number of molecules for each reactant, the limiting reactant will be hydrogen. We can effectively claim that we have 5.86/2 = 2.93 l of hydrogen and an excess of CO to consume all of the hydrogen. So the number of moles of hydrogen gas we have is: 2.93 l / 22.4 l/mol = 0.130803571 mol And since it takes 2 moles of hydrogen gas to make 1 mole of methanol, divide by 2, getting. 0.130803571 mol / 2 = 0.065401786 mol Now we just need to multiply the number of moles of methanol by its molar mass. First lookup the atomic weights involved. Atomic weight carbon = 12.0107 g/mol Atomic weight hydrogen = 1.00794 g/mol Atomic weight oxygen = 15.999 g/mol Molar mass CH3OH = 12.0107 + 4 * 1.00794 + 15.999 = 32.04146 g/mol So the mass produced is 32.04146 g/mol * 0.065401786 mol = 2.095568701 g And of course, properly round the answer to 3 significant digits, giving 2.10 grams.</span>
4 0
3 years ago
What would happen if we did not have an atmosphere?
olganol [36]

Answer:

The air would still be too thin to breathe. The lack of atmosphere would chill the Earth's surface. Organisms that need air to breathe would die.

Explanation:

Hope it helped!

6 0
3 years ago
Other questions:
  • What is the correct name for the compound, P2O5?
    9·2 answers
  • What is a mineral used in making fertillizer <br>1. silver <br>2. silica <br>3. tin <br>4. gypsum​
    14·2 answers
  • Phosphoglucoisomerase interconverts glucose 6‑phosphate to, and from, glucose 1‑phosphate.
    10·1 answer
  • What effect does adding a neutron have on the atoms identity
    7·1 answer
  • When the equation 
    8·1 answer
  • Which of the following atoms will form an ion with the most negative charge?
    6·1 answer
  • Which type of rock is most likely to form because of high heat and pressure?
    10·2 answers
  • Based on Table F, which compound is least soluble in water?
    10·1 answer
  • What happens to the amount of electrical energy when there are no clouds?
    15·1 answer
  • If 0.896 g of a gas occupies a 250 mL flask at 20°C and 760 mm Hg of pressure, what is the molar mass of the gas?​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!