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
Sodium is much more apt to exist as a cation than is chlorine. this is because __________. sodium is much more apt to exist as a
den301095 [7]
<span>Answer: Correct answers are- Electron affinity decreases; Cl has 7 valence electrons but Na has only 1. So Na is going to lose its e, Cl is going to gain an e.</span>
4 0
3 years ago
Pleasee help <br> will name brainliest
zmey [24]

Answer:

0.125. work- divide the volume value by 1000

873. work- multiply the length value by 100

98100. work- Conversion factor: 1 kg = 100000 cg

1) Centigram = Kilogram * 100000

2) Centigram = 0.981 * 100000

3) Centigram = 98100

285.65. work- 12.5°C + 273.15 = 285.65K

446.85. work- 720K − 273.15 = 446.85°C

346.25. work- 73.1°C + 273.15 = 346.25K

Explanation:

i hope this helps:)  brainliest plss??

8 0
3 years ago
Is sisig is homogeneous or heterogeneous​
givi [52]

Answer:

I think its homogeneous

Explanation:

because its all pig, just different parts of the pig

7 0
3 years ago
Methylene chloride (CH2Cl2) has fewer chlorine atoms than chloroform (CHCl3). Nevertheless, methylene chloride has a larger mole
Talja [164]

Answer:

Explanation has been given below.

Explanation:

  • Chloroform has three polar C-Cl bonds. Methylene chloride has two polar C-Cl bonds. So it is expected that chloroform should be more polar and posses higher dipole moment than methylene chloride.
  • Two factors are liable for the opposite trend observed in dipole moments of methylene chloride and chloroform.
  • First one is the number of hyperconjugative hydrogen atoms present in a molecule. Hyperconjugation occurs with vacant d-orbital of Cl atom. Hyperconjugation amplifies charge separation in a molecule resulting higher dipole moment.
  • Methylene chloride has two hyperconjugative hydrogen atoms and chloroform has one hyperconjugative hydrogen atom.Therefore methylene chloride should have higher charge separation as compared to chloroform.
  • Second one is induction of opposite polarity in a C-Cl bond by another C-Cl bond in a molecule. Higher the opposite induction of polarity, lower the charge separation in a molecule and hence lower the dipole moment of a molecule.
  • Chloroform has three C-Cl bonds and methylene chloride has two C-Cl bonds. Therefore opposite induction is higher for chloroform resulting it's lower dipole moment.
6 0
3 years ago
What causes the sugar to dissolve in water?
vaieri [72.5K]

Answer:

Sugar dissolves in water because energy is given off when the slighty polar sucrose molecules form intermoleeular bonds with the polar water molecules.

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • What is a carcinogen? a. a toxin linked to an increased risk of cancer b. a non-carbon based chemical c. a type of pollution tha
    11·2 answers
  • Who were the terrorists that attacked the united states on September 11, 2001
    7·1 answer
  • 2.5 moles of sodium chloride is dissolved<br> to make 0.050 liters of solution.
    9·1 answer
  • What is saliva composed of?​
    13·2 answers
  • It’s a organic chemistry
    7·1 answer
  • Which alignment of the Sun, Moon, and Earth causes a lunar eclipse?
    12·2 answers
  • What values can you draw from this lesson?​
    8·1 answer
  • PLS HELP ME WITH THIS ILL GIVE BRAINLIEST
    11·1 answer
  • What % of original U238 remains after three half lives?<br> 1-50<br> 2-25<br> 3-12.5<br> 4-6.25
    15·1 answer
  • What’s the answer to this
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!