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
Varvara68 [4.7K]
2 years ago
12

3. A student mixes a solid powder into a beaker of fluid. Which of the following would indicate that a chemical change has defin

itely occurred?​
Chemistry
1 answer:
Ket [755]2 years ago
5 0

Explanation:

A chemical change is a change in which a new kind of substance is produced. Such changes are always accompanied by energy changes.

They are mostly reversible.

Some examples of such reactions are combustion, rusting of iron, precipitation, rancidity of butter, souring of milk.

  • There might be some little change in mass
  • It requires a considerable amount of energy
You might be interested in
Hi i'm 9 and i need a fortnite girlfriend<br> and yes the subject is chemistry :D
Nimfa-mama [501]
Uhhhhhhh that’s kinda sus.
6 0
3 years ago
Read 2 more answers
According to the Arrhenius equation, changing which factors will affect the
slamgirl [31]

Answer:

e−(Ea/RT): the fraction of the molecules present in a gas which have energies equal to or in excess of activation energy at a particular temperature

6 0
3 years ago
The atomic number of Re is 75. The atomic mass of one of its isotopes is 186. How many neutrons are in an atom of this isotope?
USPshnik [31]

Answer:

B.111

Explanation:

Atomic mass = number of protons(or atomic number) + number of neutrons

186 = 75 + number of neutrons

number of neutrons = 186 -75 = 111

7 0
3 years ago
How many hydrogen atoms are in 3 molecules of ethyl alcohol, C2H3OH
Andrew [12]

Answer: 3 hydrogen atoms

Explanation: H=hydrogen

8 0
2 years ago
What element has the smallest atomic radius
Mariulka [41]
Helium has the smallest atomic radius® Α⇒Ω
4 0
3 years ago
Other questions:
  • How many moles of carbon in 130g of C2H6
    7·2 answers
  • Y do students have to go to school, I mean Do we have to learn we can learn at home ∞∵
    13·2 answers
  • How many periods does the modern periodic table have?
    10·1 answer
  • __NH3 + __O2 → __NO + __H2O<br> How many moles of water are produced from<br> 2.48 g of oxygen?
    13·1 answer
  • The heat of vaporization of 1–pentanol is 55.5 kJ/mol, and its entropy of vaporization is 148 J/K•mol. What is the approximate b
    8·1 answer
  • Look at the diagram below, which shows an atom of an element. How many valence electrons does it have? Based on this, would the
    14·1 answer
  • Which of these objects converts light/radiant energy to chemical energy?
    6·2 answers
  • What is the empirical formula of a compound that has a carbon to hydrogen ratio 2-6
    8·1 answer
  • Please help.... will be awarding brainliest.
    15·1 answer
  • Determine whether or not the mixing of each of the two solutions indicated below will result in a buffer.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!