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
andrey2020 [161]
3 years ago
9

I need help with the first question

Chemistry
1 answer:
gregori [183]3 years ago
7 0
Zn⁰ ----> Zn⁺²   +   2e⁻ -  oxidation
Hg⁺² + 2e⁻ ----> Hg⁰ - reduction

Zn loses 2 moles of electrons , and Hg gains 2 mole of electrons.
So, number of moles of electrons gained and lost during reaction is equal.

You might be interested in
Molar mass in sulfuric acid
EleoNora [17]

Hey there!

Sulfuric acid: H₂SO₄

H: 2 x 1.008 = 2.016

S: 1 x 32.065 = 32.065

O: 4 x 16 = 64

--------------------------------

                 98.081 g/mol

The molar mass of sulfuric acid is 98.081 g/mol.

Hope this helps!

8 0
3 years ago
If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, what will
tatiyna

Answer:

Explanation:

Molarity = number of moles / volume

If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, which is half of 550 mL, the molarity of the solution with the same number of moles of KCl is 3.5 * 2 = 7.00 M

8 0
2 years ago
Read 2 more answers
How do you find out mass in science
Aliun [14]
Multiply the volume and density together. Multiply your two numbers together, and you'll know the mass of your object. Keep track of the units as you do this, and you'll see that you end up with units of mass (kilograms or grams). Example: We have a diamond with volume 5,000 cm3 and density 3.52 g/cm3
3 0
3 years ago
Read 2 more answers
Transferring or sharing electrons between atoms forms
3241004551 [841]
It forms something called a bond.
4 0
3 years ago
The is the part of the electrical circuit along which electricity travels.
jek_recluse [69]

Answer:

The conductor runs a circular path from the power source, through the resistor, and back to the power source. The power source moves the existing electrons in the conductor around the circuit. This is called a current. Electrons move through a wire from the negative end to the positive end.

Explanation:

this help?

7 0
3 years ago
Other questions:
  • Which of the following correctly describes how rate laws are determined?
    7·2 answers
  • Balance the following reaction.<br> C₂H6+ Cl2<br> C2H4Cl2 +<br> HCI
    11·1 answer
  • When energy is transferred to alr, what happens to the particles of alr?
    7·1 answer
  • Which of the following choices must occur during all chemical changes
    15·2 answers
  • When a solution of barium nitrate and a solution of copper (II) sulfate are mixed, a chemical reaction produces solid barium sul
    14·2 answers
  • If 35.0 mL of water in a graduated cylinder is displaced by 8.00 mL
    15·1 answer
  • If the balance were not tared prior to weighing out the KHP.... how would you expect this to affect the molarity of NaOH calcula
    7·1 answer
  • ¿Cuál es el % m/m de una disolución en que hay disueltos 22 g de soluto en 44 g de disolvente?
    10·1 answer
  • Describe the processes of abrasion and plucking and how they result in the formation of a glacial horns.
    8·2 answers
  • How many moles of NO₂ would be required to produce 5.73 moles of HNO₃ in the presence of excess water in the following chemical
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!