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
Lilit [14]
3 years ago
5

What does pressure measure

Chemistry
1 answer:
Romashka [77]3 years ago
8 0

Answer:

pressure :)

Explanation:

You might be interested in
When scientists are ready to publish the results of their experiments, why is it important for them to include a description of
gizmo_the_mogwai [7]

Answer: To be able to not forget what have they done when they want to re-do it.

to make it easier for the next person to re-do the experiment.

Explanation:

the description of the procedure ensures that when the experiment  becomes of a success,specific steps are recorded for improvement of the experiment if maybe the experiment can be done at a short space of time.

3 0
3 years ago
How much energy is used to melt 44.33 g of solid oxygen?
Nutka1998 [239]

Answer:

Q1 = C * m * dT

Q2 = Qm * m

Qtotal = Q1 + Q2

Q1 - is amount of energy you need to apply to heat oxygen from the current temperature till you reach the melting temperature. Only if the oxygen is below to melting temperature.

C - is calorific capacity of oxygen -- better look at tables, it is a constant value

m - is the amount of oxygen, we will use moles because the other data shows moles, but could be grams, kg, etc.

dT - is the diference of temperatures between the current and the melting one. The melting temperature is constant and you can find it on tables, then (Tm - To)

Q2 is the amount of energy you have to add to melt oxygen once the oxygen has reached the melting temperature (Tm)

Qm is a constant value you could find on tables, depends on the mass of oxygen and is due to internal processes as changes in atomic distributions

If the oxygen is initially at melting temperature (melting point) you only need to know Q2, as dT = 0

I will do an example for you, but in future you should provide data of constants, it takes very long to find them in books or internet.

Data from tables

Tm =  54.36 K

C = 29.378 J/mol K this is at 25 C (or 298 K), is not really correct, you should look at its value at less than 54.36 K, but you can use it here.

Qm = 0.444 kJ/mol

Problem -- you have 44.33g of Oxygen -- Molecular weight of O2 is 32 g/mol

So you have 44.33/32 = 1.385 moles of oxygen

a) if oxygen is already at melting temperature: you only have to melt it

Qtotal = Q1 + Q2 = [0 (dT = 0) + Qm * m] = 0.444 * 1.385 = 0.615 kJ = 615 J

b) supposing an initial temperture of 50 K: now you have to heat oxygen till melting temperature and then melt it.

Q1 = C * m * dT = 29.378 * 1.385 * (54.36 - 50) = 177.442 J

Q2 = Qm * m = 615 J

Qtotal = 177.442 + 615 = 792.44 J

Explanation:

4 0
2 years ago
Read 2 more answers
What does a neutralization reaction produce?
algol13

Answer:

hope this help....

Explanation:

Neutralization is the reaction of an acid and a base, which forms water and a salt. Net ionic equations for neutralization reactions may include solid acids, solid bases, solid salts, and water.

7 0
3 years ago
Read 2 more answers
is the metal clip on the seatbelt in the summertime have a higher specfic heat or does the fabric on the seat belt?
SOVA2 [1]
Yes because metal is more attracted to heat from the sun
5 0
3 years ago
The procese of material going through a change of state from a gas to s liquid is called______.
taurus [48]
C: condensation
Examples are glasses fogging up and water droplets on a can of soda when it’s hot
6 0
3 years ago
Other questions:
  • In most lewis dot structures of neutral compounds, carbon as the central atom will be bound to a maximum of how many atoms, nitr
    14·1 answer
  • A general change, such as increasing or decreasing numbers
    5·1 answer
  • What are the answers to the blanks to make this equation balanced
    13·1 answer
  • A 2.567-g sample of a monoprotic acid was dissolved in water. It took 15.24 mL of a 0.1578 M NaOH solution to neutralize the aci
    8·1 answer
  • Is my answer correct?
    15·2 answers
  • Select the steps that are associated with energy entering the system. Check all that apply.
    13·2 answers
  • What is the molar concentration (molarity) of a solution made by dissolving 0.285 moles of CaCl2(s) in just enough water to form
    10·1 answer
  • Please answer ASAP!!
    10·1 answer
  • In the following reaction, in which direction, left or right, will the equilibrium shift if the following changes are made?
    13·1 answer
  • How many moles of sucrose<br> are in 5.25x1029 sucrose<br> molecules? (in scientific notation)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!