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
allsm [11]
3 years ago
11

C.) Is heating of cobalt (ii) chloride crystals a chemical change or a physical change (Imk)​

Chemistry
1 answer:
miv72 [106K]3 years ago
8 0

Answer: Heating the hydrated forms of cobalt chloride reverses the reactions above, returning cobalt chloride to the blue, water-free, or anhydrous, state. Water is "liberated" in these reactions, known as dehydration reactions.

Explanation:

You might be interested in
HELPPPPPPPP <br> I NEEED TO PASS
Monica [59]
I believe it might be c I might wrong
7 0
3 years ago
Read 2 more answers
Sodium Sulfide chemical formula
Yanka [14]

Answer:

Na2S

Explanation:Just took the test

8 0
3 years ago
How do waves affect matter they are traveling through?
s344n2d4d5 [400]
The energy of the wave does not move through anything
4 0
3 years ago
who reported four “element” classifications, but included some substances that were combinations of elements rather than true el
kozerog [31]
Answer: Antoine Lavoisier.

He classified the elements into four groups: elastic fluids, nonmetals, metals and earths. Some of the called elementes were not really elements (light and heat). Others were compounds, e.g. hydrochloric acid.






7 0
3 years ago
Read 2 more answers
Calculate the change internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the
ollegr [7]

Answer:  -64.1 kJ.  

Explanation:

According to first law of thermodynamics:

\Delta E=q+w

\Delta E=Change in internal energy

q = heat absorbed or released

w = work done or by the system

w = work done by the system=-P\Delta V  {Work is done by the system is negative as the final volume is greater than initial volume}

w = -855 Joules = 0.855 kJ     (1kJ=1000J)

q = -65.0 kJ  {Heat released by the system is negative}

\Delta E=-65.0J-(-0.855J)=-64.1kJ

Thus the change internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the surroundings is -64.1 kJ.  

6 0
3 years ago
Other questions:
  • In the unit 2 lab, what combination produced a brown bubbly liquid that looks like root-beer? (Select the two parts of the combi
    8·1 answer
  • The closest star to our Sun is Proxima
    12·1 answer
  • How may mrna be modified before it leaves the nucleus?
    9·1 answer
  • How many atoms of nitrogen and oxygen are present in a molecule of dinitrogen pentoxide?
    8·2 answers
  • Write the IUPAC substitutive name of the major product when 2-methylbut-1-ene reacts with: a) HCl b) HBr in the presence of pero
    14·1 answer
  • Anyone who could help me would be great!!! Plss!!!
    12·1 answer
  • The multistep smelting of ferric oxide to form elemental iron occurs at high temperatures in a blast furnace. In the first step,
    7·1 answer
  • How many moles of NaCl are present in 2.50 L of a 0.070 M solution?
    5·1 answer
  • In a __________________ reaction, elements are not changed, just rearranged. Small amounts of energy take place.
    15·2 answers
  • What can be done to remove a magnetic force around an electromagnet
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!