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
yaroslaw [1]
3 years ago
11

A change in state (phase change) occurs when thermal energy is added or taken away from a system.

Chemistry
2 answers:
Irina18 [472]3 years ago
8 0
True

a change of state occurs when thermal energy is added or taken away from a system.
tekilochka [14]3 years ago
3 0

Answer:

true

Explanation:

You might be interested in
Consider this initial-rate data at a certain temperature for the reaction described by N2O3(
Yuliya22 [10]

<span><span>N2</span><span>O3</span><span>(g)</span>→NO<span>(g)</span>+<span>NO2</span><span>(g)</span></span>

<span><span>[<span>N2</span><span>O3</span>]</span> Initial Rate</span>
<span>0.1 M     r<span>(t)</span>=0.66</span> M/s
<span>0.2 M     r<span>(t)</span>=1.32</span> M/s
<span>0.3 M     r<span>(t)</span>=1.98</span> M/s

We can have the relationship:

<span>(<span><span>[<span>N2</span><span>O3</span>]/</span><span><span>[<span>N2</span><span>O3</span>]</span>0</span></span>)^m</span>=<span><span>r<span>(t)/</span></span><span><span>r0</span><span>(t)
However,
</span></span></span>([N2O3]/[N2O3]0) = 2

Also, we assume m=1 which is the order of the reaction.

Thus, the relationship is simplified to,

r(t)/r0(t) = 2

r<span>(t)</span>=k<span>[<span>N2</span><span>O3</span>]</span>

0.66 <span>M/s=k×0.1 M</span>

<span>k=6.6</span> <span>s<span>−<span>1</span></span></span>

6 0
3 years ago
Read 2 more answers
True or False. Isotopes have different chemical properties. Explain why?
Maurinko [17]

Answer:

False

Explanation: isotopes generally have the same physical and chemical properties because they have the same numbers of protons and electrons.

4 0
3 years ago
.<br> What energy transformations take place when you exercise?
jolli1 [7]
Quema de calorías que son parte de la energía interna de un cuerpo 

3 0
3 years ago
Read 2 more answers
A solution was prepared by mixing 50.0 g
frez [133]

Answer:

4.78 %.

Explanation:

<em>mass percent is the ratio of the mass of the solute to the mass of the solution multiplied by 100.</em>

<em></em>

<em>mass % = (mass of solute/mass of solution) x 100.</em>

<em></em>

mass of MgSO₄ = 50.0 g,

mass of water = d.V = (0.997 g/mL)(1000.0 mL) = 997.0 g.

mass of the solution = mass of water + mass of MgSO₄ = 997.0 g + 50.0 g = 1047.0 g.

<em>∴ mass % = (mass of solute/mass of solution) x 100</em> = (50.0 g/1047.0 g) x 100 = <em>4.776 % ≅ 4.78 %.</em>

4 0
3 years ago
Which cell structures does this fish embryo cell contain? Select all that apply.
Katyanochek1 [597]

Answer:

Nucleus,mitochondria,& cell membrane

6 0
3 years ago
Other questions:
  • balloon filled with water is places in a microwave until it bursts. Name two different physical changes that occur during this r
    5·2 answers
  • In which stage of the cell cycle does the division of the nucleus occur?
    15·1 answer
  • The nucleus of an atom is _______________________ charged.
    10·2 answers
  • What is the molarity of the solution produced when 145 g NaCl is dissolved in sufficient water to prepare 2.75 L of solution? *
    11·1 answer
  • Question 1
    9·1 answer
  • The element Y has 13 electrons. What is the electronic configuration of
    5·1 answer
  • HELP!!!!!! I will give you 15 points for this , please don’t guess
    13·1 answer
  • The skeletal structure in line‑angle (line‑bond) mode of 2‑isopropyltoluene is shown. Identify the number of hydrogen atoms boun
    11·1 answer
  • Please help.
    12·1 answer
  • What mass of sugar and water is needed to make 40 g of 10% solution?​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!