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
grandymaker [24]
3 years ago
5

3g of clean mg ribbon and 8g of clean copper metal was burnt separately in equal volume of air and both mass reacted completely

with air state and explain where they was greater change in mass??​
Chemistry
1 answer:
dsp733 years ago
5 0

Answer:

gshshs

Explanation:

bshsjskskehhshs

You might be interested in
This is a type of element that has many valence electrons, not a conductor.
cestrela7 [59]
What is the question
3 0
3 years ago
What traits do all organisms with no internal themoregulation have?
Nesterboy [21]
Ectothermy and Endothermy
4 0
3 years ago
Read 2 more answers
Orbitals which valence electrons are found for calcium
galina1969 [7]
The 4th energy level (row), 's' orbital block, 2nd group (column). The valence electrons are found in the highest energy level of the electron configuration in the 's' and 'p' orbitals. In the case of calcium this is 4s2 . This gives calcium an 's' orbital with a pair of electrons in its valence shell
8 0
3 years ago
6. The graph below shows the heating curve for ethanol (from –200C to 150C). Calculate the amount of heat (kJ) required for each
Kazeer [188]

This problem is providing the heating curve of ethanol showing relevant data such as the initial and final temperature, melting and boiling points, enthalpies of fusion and vaporization and specific heat of solid, liquid and gaseous ethanol, so that the overall heat is required and found to be 1.758 kJ according to:

<h3>Heating curves:</h3>

In chemistry, we widely use heating curves in order to figure out the required heat to take a substance from a temperature to another. This process may involve sensible heat and latent heat, when increasing or decreasing the temperature and changing the phase, respectively.

Thus, since ethanol starts off solid and end up being a vapor, we will find five types of heat, three of them related to the heating-up of ethanol, firstly solid, next liquid and then vapor, and the other two to its fusion and vaporization as shown below:

Q_T=Q_1+Q_2+Q_3+Q_4+Q_5

Hence, we begin by calculating each heat as follows, considering 1 g of ethanol is equivalent to 0.0217 mol:

Q_1=0.0217mol*111.5\frac{J}{mol*\°C}[(-114.1\°C)-(-200\°C)] *\frac{1kJ}{1000J} =0.208kJ\\&#10;\\&#10;Q_2=0.0217mol*4.9\frac{kJ}{mol} =0.106kJ\\&#10;\\&#10;Q_3=0.0217mol*112.4\frac{J}{mol*\°C}[(78.4\°C)-(-114.1\°C)] *\frac{1kJ}{1000J} =0.470kJ\\&#10;\\&#10;Q_4=0.0217mol*38.6\frac{kJ}{mol} =0.838kJ\\&#10;\\&#10;Q_5=0.0217mol*87.5\frac{J}{mol*\°C}[(150\°C)-(78.4\°C)] *\frac{1kJ}{1000J} =0.136kJ

Finally, we add them up to get the result:

Q_T=0.208kJ+0.106kJ+0.470kJ+0.838kJ+0.136kJ\\&#10;\\&#10;Q_T=1.758kJ

Learn more about heating curves: brainly.com/question/10481356

7 0
2 years ago
Density equals what?
Schach [20]

Answer:

Not exactly sure what you mean by this, but "The average density of an object equals its total mass divided by its total volume."

Explanation:

Hope this helps!

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which activities describe the use of technology in science? Check all that apply.
    15·1 answer
  • True or False: The digestive system is really just a long tube that turns into a bunch of organs and ends with the large intesti
    7·1 answer
  • An online wave simulator created these four waves. Which wave has the lowest frequency?
    10·2 answers
  • B. the aldaric acid of l-idose is the same as the aldaric acid of which sugar?
    5·1 answer
  • Six Carnot engines operating between different hot and cold reservoirs are described below. The heat energy transferred to the g
    13·1 answer
  • What may happen to the electron when it loses its energy?
    13·2 answers
  • The volume of a given mass of agas is 360cm cubic at 50 degrees and 700 milimetres Hg .find it's volume at s.t.p​
    5·1 answer
  • PLEASE HELP 20 points
    12·1 answer
  • ¿QUE DATO DE LA CONFIGURACIÓN ELECTRÓNICA TE PERMITE UBICAR LOS ELEMENTOS QUÍMICOS EN LA TABLA PERIÓDICA?
    6·1 answer
  • I need to write an essay on the help benefits of plants! You do not need to write an entire essay, but I would like points and w
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!