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
AnnyKZ [126]
3 years ago
12

A scientist is studying a previously unknown chemical reaction. She concludes that it is exothermic. What must the scientist hav

e observed?
The reaction released heat.
The reaction formed a gas.
The reaction sped up when a catalyst was added.
The reaction caused the container to get cold.
Chemistry
2 answers:
SVEN [57.7K]3 years ago
6 0
I think the correct answer from the choices listed above is the first option. She concluded that the reaction is an exothermic one because t<span>he reaction released heat. Exothermic is when heat goes out of the system. The opposite is referred to as an endothermic reaction.</span>
Ann [662]3 years ago
6 0
A. <span>The reaction released heat.</span>
You might be interested in
Hard water contains relatively large concentrations of
ycow [4]

Answer:

<u><em>D.</em></u>

<u><em>All of these ions</em></u>

Explanation:

Hope this helps:)

5 0
3 years ago
Read 2 more answers
Calculate the density of each object
poizon [28]
Object one is 5.2 g/cm3
object two is 3.46g/ml
7 0
3 years ago
Which of the following characteristics do all unicellular organisms share?
Serhud [2]
Unicellular organisms...

Contain a single cell in their body

Do not contain membrane bound organelles

Use simple diffusion as a transport mechanism

All cellular processes are carried out by the single cell

Only visible under the microscope

Injury in the cell leads to the death of the organism

Asexually reproduce by binary fission

Sexually reproduce by conjugation

Lifespan is comparatively short

3 0
2 years ago
Unlike humans, termites are able to extract energy from wood because:
Sholpan [36]
Unlike humans, termites are able to extract energy from wood because: they have some microorganisms living in their gut that are able to break down cellulose.
3 0
3 years ago
According to the information in your study unit which of the following locations require the highest illuminance
spin [16.1K]
The correct answer to this question  is option D. A study area to the information in your study unit, the location that has to be the highest illuminance is the study room because it is the place the students can stay to study. 

Hoped this helped :D
7 0
3 years ago
Other questions:
  • Sort the following chemicals for their ability to act as an oxidizer. List from strongest to weakest; 1 being strongest, 6 being
    6·1 answer
  • What is the mass percent concentration of a saline solution prepared by dissolving 1.00 mol of Na2SO4 in 1.00 L of water?
    6·1 answer
  • A chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be
    14·1 answer
  • Write an electron configuration for an atom of aluminum-27 in an excited state
    14·2 answers
  • Which of the following are indicators of a chemical change?
    7·2 answers
  • An object with a height of 0.3 meter is placed at a distance of 0.4 meter from a concave spherical mirror. An image with a heigh
    6·2 answers
  • Which of the following will occur if a prokaryotic cell is placed in a solution that has a higher concentration of solutes (that
    6·1 answer
  • PLEASE ANSWER ASAP
    8·2 answers
  • How many molecules of CrCl₃ are produced when 2.89 moles of CuCl₂ react? *<br> 2Cr+3CuCI2-2CrCI3+3Cu
    6·1 answer
  • What statement correctly describes gravity
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!