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
jonny [76]
3 years ago
10

PLEASE HELP 20 POINTS

Chemistry
1 answer:
Rudiy273 years ago
4 0
Because the iron in the sand gives the sand a different weight than needed. a lot of people either just need the iron or the sand when mixed it gives the wrong outcome of what was needed.
You might be interested in
How are the orbits of asteroids similar to, or different from planetary orbits?
Strike441 [17]
Aside from banks, what are 2 other places you might be able to borrow
money? And can you help with more questions on my page thank you so much I really appreciate you and everything you do for this app
7 0
3 years ago
Be sure to answer all parts. A concentration cell consists of two Sn/Sn2+ half-cells. The electrolyte in compartment A is 0.23 M
kolbaska11 [484]

Answer:

Part A. The half-cell B is the cathode and the half-cell A is the anode

Part B. 0.017V

Explanation:

Part A

The electrons must go from the anode to the cathode. At the anode oxidation takes place, and at the cathode a reduction, so the flow of electrons must go from the less concentrated solution to the most one (at oxidation the concentration intends to increase, and at the reduction, the concentration intends to decrease).

So, the half-cell B is the cathode and the half-cell A is the anode.

Part B

By the Nersnt equation:

E°cell = E° - (0.0592/n)*log[anode]/[cathode]

Where n is the number of electrons being changed in the reaction, in this case, n = 2 (Sn goes from S⁺²). Because the half-reactions are the same, the reduction potential of the anode is equal to the cathode, and E° = 0 V.

E°cell = 0 - (0.0592/2)*log(0.23/0.87)

E°cell = 0.017V

3 0
4 years ago
When the concentration of a substance differs from one area to another, this creates a concentration.
bija089 [108]

The difference in the concentration of a substance between two areas is called the concentration gradient. When a region has a higher particle concentration than another, this is known as a concentration gradient. A concentration gradient will cause particles in passive transport to diffuse down it from higher concentration to lower concentration until they are evenly spaced.

The gradual separation of a region of high density from a region of low density in a solution in terms of the concentration of a dissolved material. Understanding how ions and particles flow randomly in a solution or gas depends on the concentration gradient.

To learn more about concentration, click here.

brainly.com/question/10725862

#SPJ4

4 0
2 years ago
Choose the correct statement about melting points. * Melting point can tell us if we have a mixture of compounds (for example, c
goldfiish [28.3K]

Answer: All of these statements are true

Explanation:

Melting point help us to determine if a mixture is pure or has impurities by the virtues of it melting range..

4 0
4 years ago
One of the most difficult solar energy design problems to solve is:
Sonja [21]
I'm not sure but i would say C.storing the heat energy.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Balance the following equation: (3pts) Al + HBr --> AlBr3 + H2
    8·1 answer
  • Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
    9·2 answers
  • Calculate the wavelength of light with an energy of 3.60x10^-19 J *
    9·1 answer
  • A solution is highly concentrated if there is:
    6·1 answer
  • How many molecules in 11 grams of CO2?
    13·1 answer
  • URGENT HELP PLEASE balance equation !20 points!
    5·1 answer
  • Precipitation reactions always occur when two aqueous solutions are mixed (T/F)
    13·1 answer
  • Where information about each element is located
    7·1 answer
  • The crust and upper mantle make up Earth's ____.
    9·1 answer
  • Because they have aromas, compounds with a ring of resonance bonds are called –
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!