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
motikmotik
3 years ago
5

Question 7

Chemistry
1 answer:
Rufina [12.5K]3 years ago
4 0

Answer:

The 4 physical changes are. 1) Melt, 2) Evaporate, 3) Dissolve, 4) Bend.

You might be interested in
You have an unknown quantity of oxygen at a pressure of 2.2 atam, a volume of 21 liters and a temperature of 87 Celsius. How man
laila [671]

<span>Let's assume that the oxygen gas has ideal gas behavior. 
Then we can use ideal gas formula,
      PV = nRT</span>


Where, P is the pressure of the gas (Pa), V is the volume of the gas (m³), n is the number of moles of gas (mol), R is the universal gas constant ( 8.314 J mol⁻¹ K⁻¹) and T is temperature in Kelvin.

<span>
P = 2.2 atm = 222915 Pa
V = 21 L = 21 x 10</span>⁻³ m³

n = ?

R = 8.314 J mol⁻¹ K⁻¹

<span> T = 87 °C = 360 K

By substitution,
</span>222915 Pa x 21 x 10⁻³ m³ = n x 8.314 J mol⁻¹ K⁻<span>¹ x 360 K
                                       n = 1.56</span><span> mol</span>

<span>
Hence, 1.56 moles of the oxygen gas are </span><span>left for you to breath.</span><span>
</span>
6 0
3 years ago
Electrical charge may be rapidly moved from one body to another by means of a(n)
Snowcat [4.5K]
<span>Conductor, and there you go, i hope this helped but if its wrong, i am extremly sorry</span>
5 0
3 years ago
Read 2 more answers
After creating a prototype, which of the following would not be an appropriate next step in the design process of a new technolo
Ivanshal [37]
I would say D but i am not entirely sure 
4 0
3 years ago
Which of the following statements does not describe a chemical property of oxygen:
g100num [7]
I have a feeling that #2 is the one.
5 0
3 years ago
Gold can undergo transmutation. Which equation could correctly describe this radioactive decay?
drek231 [11]
The answer is B i know this because i just took it
7 0
3 years ago
Read 2 more answers
Other questions:
  • If 61.1 mL of lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.636 g of precipitate, wh
    13·1 answer
  • Calculate the [ OH − ] and the pH of a solution with an [ H + ] = 0.090 M at 25 °C . [ OH − ] = M pH = Calculate the [ H + ] and
    15·1 answer
  • 15. Calculate the hydrogen ion concentration of a
    8·1 answer
  • Yvonne is interested in the field which weighs morality and the technological ability to modify genetic material in humans. She
    9·2 answers
  • Which of these are intensive properties? There can be more than one answer.
    6·1 answer
  • 1. If 500 ML of a 3 L sample of 0.20 M sodium chloride solution is spilled, what is the concentration of the remaining solution?
    9·1 answer
  • When blood moves from an atrium to a ventricle, it must pass through a __________
    7·2 answers
  • How do you find the number of moles of copper in copper gluconate? In my experiment I used 1.4 g of copper gluconate, and ended
    9·1 answer
  • When two balls collide, the momentum of the balls after the collision is explained by?
    5·1 answer
  • Use the patterns you identified to estimate the likely melting point for potassium (K) in Group 1 and barium (Ba) in Group 2. En
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!