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
Archy [21]
3 years ago
9

Please please do it because i need an answer.

Chemistry
1 answer:
Natali [406]3 years ago
3 0

Answer:

Positive and Negative electric charge

You might be interested in
H2(g) + F2(g) → 2 HF(g) ΔH=-546 kJ
Arisa [49]

Answer: help please !!

Explanation:

4 0
3 years ago
Read 2 more answers
5. How can you tell the difference between CuS and Cu2S
puteri [66]

Answer:

Density, melting point. and magnetic properties  

Explanation:

I can think of three ways.

1. Density

The density of Cu₂S is 5.6 g/cm³; that of CuS is 4.76 g/cm³.

It should be possible to distinguish these even with high school equipment.

2. Melting point

Cu₂S melts at 1130 °C (yellowish-red); CuS decomposes at 500 °C (faint red).

A Bunsen burner can easily reach these temperatures.

3. Magnetic properties

You can use a Gouy balance to measure the magnetic susceptibilities.

In Cu₂S the Cu⁺ ion has a d¹⁰ electron configuration, so all the electrons are paired and the solid is diamagnetic.

In CuS the Cu²⁺ ion has a d⁹ electron configuration, so all there is an unpaired electron and the solid is paramagnetic.

A sample of Cu₂S will be repelled by the magnetic field and show a decrease in weight.

A sample of CuS will be attracted by the magnetic field and show an increase in weight.

In the picture below, you can see the sample partially suspended between the poles of an electromagnet.

 

6 0
3 years ago
What are the products produced when an acid and base react together
SashulF [63]
Both products will start to cancel the acidity and how strong the base is if they are mixed. If the acid is stronger than the base then it will be an acidic product and visa versa if the base is stronger than the acid.
4 0
3 years ago
Read 2 more answers
Compounds can be broken down by using what method?
Dima020 [189]

Answer:

chemical change

Explanation:

chemical change requires energy in the form of heat or electricity.

4 0
3 years ago
How many atoms are equal to 1.5 moles of hellium
ANTONII [103]

Answer:

There are 1.8×1024 atoms in 1.5 mol HCl

Explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • Which statement is true about writing chemical formulas of covalent compounds?
    6·2 answers
  • What is the density of a sample of a substance with a volume of 120ml<br> and a mass of 90g?
    11·1 answer
  • If the same amount of energy in the form of heat is added to 8.9 g samples of each of the metals below, which metal will undergo
    13·1 answer
  • A solid precipitate is formed from the reaction of lead nitrate and sodium chromate.
    8·2 answers
  • Please hlep me on this 2 questions
    9·2 answers
  • Why do you think we have different seasons?
    15·1 answer
  • The electron configuration for Cu is
    11·1 answer
  • Large compounds that are composed of many smaller molecular subunits, most notably biochemicals are referred to as.
    5·1 answer
  • A new element (solid at room temperature) is discovered that has:
    14·1 answer
  • An ice cube absorbs 353 cal of
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!