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
Klio2033 [76]
3 years ago
6

Is smelting copper is a chemical change or physical change?

Chemistry
1 answer:
Grace [21]3 years ago
8 0
Smelting copper is a chemical change
You might be interested in
Which piece of laboratory glassware did you find to be more efficient for the solvent extraction procedure, and why?
Anna [14]

Answer:

Condenser

Explanation:

Condenser is highly efficient when dealing with the vapors of the product are need to be liquified. It is mostly automated and regularly condenses the incoming vapors into liquid. It is very easy to use. All we have to do it to attach incoming and outgoing flow pipes and constantly monitor the flow of cold water through the condenser. It is made up of special kind of PYREX glass so that it won't break when dealing with steam.

7 0
3 years ago
What is the number of copper atom in one naira coin which weight is 7.3g a sum of the material is 86%
Step2247 [10]

Answer:

5.9x10²² atoms of Cu are in one naira coin

Explanation:

To solve this question we need to find the mass of Copper. Then, using its molar mass (Cu = 63.546g/mol) we must find the moles of Cu and its atoms using Avogadro's number:

<em>Mass Cu:</em>

7.3g * 86% = 6.278g is the mass of Cu.

<em>Moles Cu:</em>

6.278g * (1mol / 63.546g) = 0.099moles Cu

<em>Atoms Cu:</em>

0.099moles Cu * (6.022x10²³atoms / 1mol) =

<h3>5.9x10²² atoms of Cu are in one naira coin</h3>
4 0
2 years ago
What is significant about the temperature absolute zero
lara [203]
<span>0 K on the Kelvin scale, which is absolute temperature scale; and –273.15 degrees Celsius on the Celsius scale, thus world wide has come to an agreement saying absolute zero is precisely. </span>
4 0
3 years ago
Read 2 more answers
Identify the acid and conjugate base pair in the following equation:
Serjik [45]

Answer:

hola no ablo inalgun moderador puede acabar a este otro este me borró respuesta que no debió borrar

7 0
2 years ago
Calculate the atomic mass of chromium it’s composition is 83.79% with a mass of 51.94 amu; 9.50% with a mass of 52.94 Amu; 4.35%
Elina [12.6K]

<span><span>Convert the percentages into decimals (you can do that by dividing the percent by 100), then multiply that by its corresponding mass to find its relative amount/ contribution to the atomic mass of chromium. After doing so, add all of the obtained values together to get the average mass.

</span> 83.79% = .08379
9.50% = .095
4.35% = .0435
2.36% = .0236

Average mass of chromium = 0.8379(51.94) + 0.095( 52.94) + 0.0435(49.95) + 0.0236(53.94)

Answer: 52amu

P.S. never forget units
</span>
8 0
3 years ago
Other questions:
  • In a popular song from 1970, the musical group Crosby, Stills, and Nash use the line, "We are stardust." Why is this statement t
    10·2 answers
  • When 13.0 g of a hydrocarbon are burned in excess O2, 9.0 g of H2O are formed. What is the formula of the hydrocarbon?
    10·1 answer
  • How many atoms are there in 1.75 moles of CHCl3
    5·1 answer
  • Given this equation: 2P2O5 + 6H2O ---&gt; 4H3PO4.
    14·1 answer
  • How many liters of ethylene glycol antifreeze (C 2H 6O 2) would you add to your car radiator containing 15.0 L of water if you n
    8·1 answer
  • What is the molar mass of the EF?
    15·2 answers
  • Write the number 874.591 correct to 2 decimal places<br>​
    9·2 answers
  • What type of weathering will occur more rapidly in an area with extremely cold winters and hot summers?
    10·2 answers
  • Please help help ASAP Please help It’s do in a 1 hour What conclusion can you draw about the relationship between physical activ
    8·2 answers
  • How much heat has been lost when a 78 g piece of copper is placed into a calorimeter and cools from 120°C to
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!