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
den301095 [7]
3 years ago
14

In chemistry, we did a lab in which we had a certain mass of copper, performed multiple experiments on the copper, and at the en

d, extracted the copper from a solution and weighed it. The goal was that the mass of the final copper should be the same as the mass of the initial copper.
During the final step, the copper pieces are put in an evaporating dish and placed over boiling water in a beaker (on a hot plate) so that the copper will dry, the excess water will evaporate, and all that will be left is the mass of the copper. Here is the question:
What is the maximum temperature to which the evaporating dish containing copper will be heated in Part G? How is this known?
I really don't know the answer to this question or how to find out, as we did not take the temperature of anything during the experiment. The only thing I can think of is that water boils at 100 degrees Celsius so the temperature of the steam (the heat of which evaporates the water) must be around then, so that must also be the max temp of the evaporating dish..
Or I was also thinking that we know that max temp of the evaporating dish must be lower than the melting point of copper because the copper is dried but not overheated.
Chemistry
1 answer:
JulsSmile [24]3 years ago
6 0
The question is a a bit confusing but since the melting point of copper is about 1000 Celsius we don't want to go that high so i think as long as we stay with 100 Celsius so all the water evaporates we are good
You might be interested in
A common laboratory method for preparing a precipitate is to mix solutions containing the component ions. Does a precipitate for
laiz [17]

Answer:

CaF2 will not precipitate

Explanation:

Given

Volume of Ca(NO3)2 = 10 ml

Molar concentration of Ca(NO3)2 = 0.001

Volume of NaF = 10 ml

Molar concentration of  NaF  = 0.0001

Ksp for CaF2 = 3.2 * 10^ {-11}

CaF2 will precipitate if Q for the reaction is greater than ksp of CAF2

Moles of calcium ion

= 10 * 0.001\\= 0.01

[Ca2+] = \frac{0.01}{10 + 10} \\= \frac{0.01}{20} \\= 5 * 10^{-4}

Moles of F- ion

= 10 * 0.0001\\= 0.001

[F-] = \frac{0.001}{10 + 10} \\= \frac{0.001}{20} \\= 5 * 10^{-5}

Q = [Ca2+] [F-]^2\\= (5 * 10^{-4}) * (0.5* 10^-4)\\= 1.25 * 10^{-12}

Q is lesser than Ksp value of CaF2. Hence it will not precipitate

5 0
2 years ago
How many independent variables can you have in an experiment for it to be valid?
Lemur [1.5K]

Answer:

There are often not more than one or two independent variables tested in an experiment.

3 0
3 years ago
Identify the balanced chemical equation that represents a single displacement reaction. CF4 2Br2 ⟶ CBr4 2F2 3H2SO4 2Al ⟶ Al2(SO4
Simora [160]

Answer:

3H₂SO₄ + 2Al₂(SO₄)₃  → Al₂(SO₄)₃ + 3H₂

Explanation:

                           3H₂SO₄ + 2Al₂(SO₄)₃  → Al₂(SO₄)₃ + 3H₂

In this type of reaction, one substance is replacing another:

                      A + BC  →  AC + B

In a single displacement reaction, atoms replace one another based on the activity series. Elements that are higher in the activity series. Also, if the element that is to replace the other in a compound is more reactive the reaction will occur. If it is less reactive, there will be no reation.

In the first equation, fluorine is more reactive than bromine. Therefore, bromine cannot replace bromine.

In the second equation, the displacement is between hydrogen and aluminium. Hydrogen is lower in the activity series, this implies that aluminum will replace it.

5 0
3 years ago
How to find the number of neutrons in an isotope?
Alexeev081 [22]
Chemical properties of elements are primarily determined by the electrons but not by neutrons. Therefore, the isotopes of the same element have similar chemical behavior. (a) The atomic number is 17, so there are 17 protons and 17 electrons. The mass number is 35, so there are 18 (=35-17) neutrons. Hope this helps. :)
4 0
3 years ago
Bakit mahalaga ang paghahanda ng pambansang badyet sa isang taon?​
Andreas93 [3]

Answer:

no lo sé chico ve a morir en un agujero

Explanation:

8 0
2 years ago
Other questions:
  • Need some help with these problems
    11·1 answer
  • A person uses a pulley to raise a flag up a 15 meter flagpole. The weight of
    13·1 answer
  • Which of the following is a property of water? It can freeze very fast. It has low heat capacity. It exists in all three states
    7·2 answers
  • Question 26(Multiple Choice Worth 1 points) [01.03]Which of the following statements does not support scientific evidence of the
    5·1 answer
  • If the ksp of CoCl2 is 1.5x10^-5 calculate the molar solubility
    9·1 answer
  • Which equation agrees with the ideal gas law?<br> V V2<br> OTT<br> O V. = V202<br> o Pina = P212
    8·1 answer
  • Please complete the sentence. Matter can be classified as a(n) ____________ or a(n) ________________?
    11·2 answers
  • a solid mass of 25 g is mixed with 60 g of a solution. a chemical reaction takes place and a gas is produced. the final mass of
    7·2 answers
  • Help I can’t figure it out.
    7·2 answers
  • PLSSSSS HELPPPPPPPPPPPP
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!