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
IgorC [24]
4 years ago
9

Which of the following best describes exothermic chemical reactions?​

Chemistry
1 answer:
zlopas [31]4 years ago
3 0
They always release heat
You might be interested in
Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is the sum of the pressures exert
Damm [24]

Answer: The given statement is true.

Explanation:

According to the Dalton's law, total pressure of a mixture of gases that do not react with each other is equal to the partial pressure exerted by each gas.

The relationship is as follows.

          p_{total} = \sum_{i=1}^{n} p_{i}

or,        p_{total} = p_{1} + p_{2} + p_{3} + p_{4} + ......... + p_{n}

where,  p_{1}, p_{2}, p_{3} ....... = partial pressure of individual gases present in the mixture

Also, relation between partial pressure and mole fraction is as follows.

                 p_{i} = p_{total} \times x_{i}

where,      x_{i} = mole fraction

Thus, we can conclude that the statement Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture, is true.              

5 0
3 years ago
Lead will float in water.
Fed [463]

Actually, no. While their mass may be the same (1kg), the volume of lead is a lot smaller than that of feathers. As there is the same mass stuffed in a smaller space, it must be denser. The density of water is 1 g/cm3, so if the density of the lead is more than 1g/cm3, it has to sink

7 0
3 years ago
Read 2 more answers
What types of elements are responsible for the colors of fireworks?
AfilCa [17]
Transition metals usually 
3 0
3 years ago
Every object in the universe is always exerting force and is measured as
bonufazy [111]
Gravity, its what holds the whole universe together
6 0
4 years ago
Help help help.
Whitepunk [10]
I think B
Hope this helps!
4 0
3 years ago
Other questions:
  • ) What is the definition of an enzyme? A.Enzymes are carbohydrate molecules that act as catalysts to speed up chemical reactions
    5·1 answer
  • What does it mean if something is insoluble
    7·1 answer
  • How is each of the lizards adapted to its environment?
    13·1 answer
  • Chemical equations
    10·2 answers
  • I need number 5,6 please thanks
    6·1 answer
  • The Earth, the Sun, and the rest of the solar system are almost unimaginably old when viewed on a human time scale. While modern
    9·2 answers
  • which statement describes the way in which energy moves between a system of reacting substances and surroundings ​
    10·1 answer
  • What is the energy produced through cellular respiration called?
    8·1 answer
  • What is the formula of hydrogen ????​
    12·2 answers
  • (image attached) AP CHEM ACID BASE Is my answer correct? I will mark as brainliest if you answer me. I don't need an explanation
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!