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
PilotLPTM [1.2K]
3 years ago
12

Question 3

Chemistry
1 answer:
nikklg [1K]3 years ago
5 0
This guy need to stop with this link
You might be interested in
What is the final concentration of cl- ion when 250 ml of 0.20 m cacl2 solution is mixed with 250 ml of 0.40 m kcl solution? (as
serious [3.7K]

CaCl2 and KCl are both salts which dissociate in water when dissolved. Assuming that the dissolution of the two salts are 100 percent, the half reactions are:

<span>CaCl2 ---> Ca2+  +  2 Cl-</span>

KCl ---> K+ + Cl-

Therefore the total Cl- ion concentration would be coming from both salts. First, we calculate the Cl- from each salt by using stoichiometric ratio:

Cl- from CaCl2 = (0.2 moles CaCl2/ L) (0.25 L) (2 moles Cl / 1 mole CaCl2)

Cl- from CaCl2 = 0.1 moles

 

Cl- from KCl = (0.4 moles KCl/ L) (0.25 L) (1 mole Cl / 1 mole KCl)

Cl- from KCl = 0.1 moles

 

Therefore the final concentration of Cl- in the solution mixture is:

Cl- = (0.1 moles + 0.1 moles) / (0.25 L + 0.25 L)

Cl- = 0.2 moles / 0.5 moles

<span>Cl- = 0.4 moles             (ANSWER)</span>

6 0
3 years ago
What is the key difference that causes the atoms of one element to differ from the atoms of the other elements? A the number of
Akimi4 [234]

Answer:

B = the number of protons

Explanation:

The atom of every elements differ from each other because of number of protons they have.

Every atom consist of neutron, proton and electron. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron.

The number of neutrons may be same but every atom have different number of protons.

Neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

Symbol of proton= P+  

Symbol of neutron= n0  

Mass of proton=1.672623×10-27 Kg

Mass of neutron=1.674929×10-27 Kg

8 0
3 years ago
Which of the following would form an anion? Ar K Al O
Norma-Jean [14]
Anion means negatively charged ion.

Among Ar, K, Al and O, only O forms anion.

Hope this helps!
4 0
3 years ago
Read 2 more answers
Drag each title to the correct location <br> Classify the reactions as endothermic or exothermic
Maurinko [17]

Answer:

Explanation:

PLEASE ASK THE QUESTION CLEARLY BY GIVING YOUR REFERENCE

3 0
3 years ago
Which statement can best be concluded from the ideal gas law?
Allisa [31]
The answer is        -B-            -B-
3 0
3 years ago
Read 2 more answers
Other questions:
  • Why is it that you can not feel earths movement but you can observes its effects
    6·1 answer
  • 1) A toy car with a mass of 2.35 kg is pushed with a force of 21.6 N. What is the acceleration of the car?
    7·1 answer
  • Copper is plated on zinc by immersing a piece of zinc into a solution containing copper(II) ions. In the plating reaction, coppe
    7·1 answer
  • How are amplitude modulation and frequency modulation techniques similar?
    14·2 answers
  • Balance it by oxidation number method:Zn +HNO3----Zn(NO3)2+NO+H2O​
    10·2 answers
  • Question 1 of 10
    11·1 answer
  • A freshwater stream flows into the ocean as shown in the diagram which statement correctly describes how the stream affects thes
    7·2 answers
  • Can u pls help me with this question ​
    6·1 answer
  • In a tug of war, the team on the left pulls with a force of 430 N and the team on the right pulls with a force of 420 N. What is
    12·1 answer
  • You open the refrigerator and take out a slice of leftover pizza. You put it in the microwave oven, turn it on, and watch for th
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!