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
svlad2 [7]
3 years ago
6

Please help brainiest is award.

Chemistry
1 answer:
sineoko [7]3 years ago
3 0

Answer:

7688

Explanation:

You might be interested in
A 45.0-gram sample of copper metal was heated from 20.0°C to 100.0°C. Calculate the heat absorbed, in kJ, by the metal.
s2008m [1.1K]

Answer:

1.386 KJ

Explanation:

From the question given above, the following data were obtained:

Mass (M) of copper = 45 g

Initial temperature (T1) = 20.0°C

Final temperature (T2) = 100.0°C

Heat absorbed (Q) =..?

Next, we shall determine the change in temperature. This can be obtained as follow:

Initial temperature (T1) = 20.0°C

Final temperature (T2) = 100.0°C

Change in temperature (ΔT) =?

ΔT = T2 – T1

ΔT = 100 – 20

ΔT = 80 °C

Next, we shall determine the heat absorbed by the sample of copper as follow:

Mass (M) of copper = 45 g

Change in temperature (ΔT) = 80 °C

Specific heat capacity (C) of copper = 0.385 J/gºC

Heat absorbed (Q) =..?

Q = MCΔT

Q = 45 × 0.385 × 80

Q = 1386 J

Finally, we shall convert 1386 J to KJ. This can be obtained as follow:

1000 J = 1 KJ

Therefore,

1386 J = 1386 J × 1 KJ /1000 J

1386 J = 1.386 KJ

Thus, the heat absorbed by the sample of the sample of copper is 1.386 KJ.

5 0
2 years ago
How many atoms are in c8h8o3?<br> Show your work
Gelneren [198K]

Answer:

im positive that it's 19

8 0
2 years ago
Please Please Please Please Please Help Me (please answer this question completely and 1 will friend you and help you with your
pav-90 [236]

Answer:

Static electricity is a type of energy that is produced by friction.

Explanation:

Static electricity may be the result when there is an imbalance between the negative charges and the positive charges in the surroundings. They are non contact forces. They pull of push without actually touching the body. The charged particles interact by pulling or pushing the uncharged particles.

These charges are released when they come closer to some uncharged or other charged particles like the electrostatic charges. It is the charge build up in an area.

6 0
3 years ago
The equation shows one mole of ethanol fuel being burned in oxygen. Convert the energy released into its equivalent mass. C2H5OH
lana [24]

Answer:

47.9 g of ethanol

Explanation:

Combustion is a chemical reaction in which a substance reacts with oxygen to produce heat and light. Combustion reactions have been very useful as a source of energy. Ethanol is now burnt for energy purposes as a fuel. Ethanol has even been proposed as a possible alternative to fossil fuels.

Since 1 mole of ethanol when combusted releases 1367 kJ/mol of energy

x moles of ethanol releases 1418 kJ/mol.

x= 1 × 1418 kJ/mol/ 1367 kJ/mol

x= 1.04 moles of ethanol.

Mass of ethanol = number of moles × molar mass

Molar mass of ethanol = 46.07 g/mol

Mass of ethanol = 1.04 moles × 46.07 g/mol

Mass of ethanol= 47.9 g of ethanol

7 0
2 years ago
Can someone help this is a final exam its really important
Burka [1]
Do you still need help?!?!
5 0
2 years ago
Other questions:
  • Given the equation 2CH4 S8 --&gt; 2CS2 4H2S Calculate the moles of H2S produced when 1.5 mol S8 is used.
    14·1 answer
  • Inside the room the air is often warmer near the ceiling than near the floor. Which of the following accounts for the difference
    12·1 answer
  • Calculate and record the expected mass of benzoic acid required to react with 20.00 ml of a 0.100 m sodium hydroxide solution. r
    11·1 answer
  • How many milliliters of .5 M HCl will neutralize 35 mL of 1 M NaOH?
    15·1 answer
  • The chain on a bicycle rusts faster when the bicycle is left outside in damp conditions. Which of the following factors affect t
    5·1 answer
  • Compare the densities of two objects that have the same volume, but one feels heavier than the other. Please help
    8·2 answers
  • Predict the products of the following reaction based upon solubility rules. (Separate substances in a list with a comma. Include
    13·1 answer
  • 42. What is the valency of carbon in CH3-CH3, CH2=CH2 and HC=CH​
    7·1 answer
  • Please help me out! :))
    12·1 answer
  • Compare the following in the three states of matter
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!