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
natima [27]
3 years ago
15

Which of these is an indication that a chemical reaction has occurred?

Chemistry
1 answer:
nevsk [136]3 years ago
3 0

Formation Of A Gas.

You might be interested in
In which chemical system is molecule to ion attractions present? A) KNO3(s) B) KNO3(l) C) KNO3(aq) D) KNO3(g)
Maurinko [17]

Answer:

KNO_3 (aq)

Explanation:

Potassium nitrate is a soluble salt which readily dissolves in a polar solvent, such as water. When solid potassium nitrate is dissolved in water, it dissociates into potassium cations and nitrate anions.

Due to the resultant ionic charges, the polar water molecules attract the resultant ions and potassium nitrate ions become hydrated, that is, surrounded by water molecules.

Nitrate, our anion, attracts the partially positive ends of water molecules by attracting them via hydrogen atom.

Potassium, the cation, attracts the partially negative end of water molecules by attracting via oxygen atom.

3 0
3 years ago
To measure the temperature of water in a chemistry expierment You should use the Fahrenheit scale. True or false
jeyben [28]
False. hope that helped
8 0
3 years ago
Name the salt produced if sodium carbonate reacts with dilute nitric acid ? Write the equation.
Angelina_Jolie [31]

Answer:

2HNO3 +Na2CO3 → CO2 + H2O + 2NaNO3

5 0
2 years ago
How many molecules are in 3 moles of NaCl?
PtichkaEL [24]

Answer:

Given : No. Of moles = 1.5

To calculate : no. Of molecules =N

We know that moles = N / 6.022 x 10²³

Therefore, 1.5 x 6.022 x 10²³ = N

Hence N = 9.0330x 10²³ molecules

3 0
3 years ago
The Bantu were experts in this form of metallurgy. gold steel iron copper
son4ous [18]
they're experts in iron metallurgy

The bantu was originated from the southern part of Africa ( round republic of Congo) , and has been the expert of utilizing iron among the ancient tribe

Mostly they use it for their Agricultural  system ( such as their Irrigation system, for their agricultural tools, etc)
<span />
4 0
2 years ago
Read 2 more answers
Other questions:
  • Definition: The possible state for an electron of an atom that is proportional to its distance to the nucleus.
    5·1 answer
  • Describe the buffer capacity of the acetic acid buffer solution in relation to the addition of both concentrated and dilute acid
    11·1 answer
  • What is the independent variable for a dry ice experiment
    12·2 answers
  • How many atoms are in 2 mol of Iron
    8·2 answers
  • What is the difference between a compound and a mixture? Group of answer choices One is a solid and the other is a liquid. They
    10·1 answer
  • The number of atoms in 5.78 mol NH4NO3. Show your work.
    14·2 answers
  • Help please!
    11·1 answer
  • - Calculate the molarity of 23 grams of OH in 24<br> of water
    14·1 answer
  • How does Dr. Hayes' and Dr. Malaska’s research differ? Why are both research projects important?
    7·1 answer
  • In his explanation of the threshold frequency in the photoelectric effect, Einstein reasoned that the absorbed photon must have
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!