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
Snezhnost [94]
3 years ago
14

An aqueous solution of iron(II) iodide has a concentration of 0.215 molal. The percent by mass of iron(II) iodide in the solutio

n is
Chemistry
1 answer:
Basile [38]3 years ago
8 0

Answer:

6.24%

Explanation:

Molality by definition means a measurement of the number of moles of solute in solution with 1000 gm or 1Kg solvent. Notice the difference that Molarity is defined on the volume of solution and Molality on the mass of solvent.

So, An aqueous solution of iron(II) iodide has a concentration of 0.215 molal.

means 0.215 moles are present in 1 Kg of solvent.

The molar mass of Fe2I = 309.65 g / mole

mass of FeI2 = moles x molar mass

= 0.215 x 309.65

=66.57 gm

mass % of FeI2 = mass of FeI2 x 100 / total mass

= 66.57x 100 / (1000 +66.57)

= 6.24%

                           

You might be interested in
The electron configuration of a neutral atom is 1s22s22p63s2. Write a complete set of quantum numbers for each of the electrons.
Pavlova-9 [17]

Answer:

The four quantum number for each electron will be:

1s^{2}

n=1;l=0;m=0;s=+\frac{1}{2}/-\frac{1}{2}

2s^{2}

n=2;l=0;m=0;s=+\frac{1}{2}/-\frac{1}{2}

2p^{6}

n=1;l=1;\\m=+1,0.-1 \\s=+\frac{1}{2}/-\frac{1}{2}

3s^{2}

n=3;l=0;m=0;s=+\frac{1}{2}/-\frac{1}{2}

Explanation:

As the element is neutral, the number of protons will be equal to number of electrons which will be the atomic number of the element.

Number of electrons =12

Atomic number = 12

Element : Magnesium

The principal shell is represented by "n"

i) For "s" subshell the value of l =0 (azimuthal quantum number) thus m (magnetic quantum number)= 0

The two electrons in s subshell will have either plus half or minus half spin quantum number

ii) for "p" subshell the value for l =1

thus m = 0 or +1 or -1

The two electrons in each orbital will have either plus half or minus half spin quantum number

8 0
2 years ago
How would you describe a food chain to someone who never thought about that idea before
umka21 [38]
A food chain is a sequence going from the producers on the bottom to the consumers to the top that shows what consumer eats what
6 0
3 years ago
Complete the sentence.
Leno4ka [110]

Answer:

6, double

Explanation:

Hex- is a prefix for number 6.

Ene- is a suffix for a double bond.

7 0
3 years ago
Can someone please help me? :(
Dmitriy789 [7]
Answer:

Trade winds


Explanation:

I am not sure
7 0
2 years ago
One liter of air contains about 0.21 L of oxygen. When filled, the human lungs hold about 6.0 L of air. How much oxygen is in th
masya89 [10]
Since we are told that 1L of air contains 0.21L of oxygen, you can use the conversion (0.21L O₂)/(1L air).  That means that you can just multiply 6.0L by 0.21L to get 1.26L of O₂.
that means that the lungs can hold about 1.26L of oxygen.
I hope this helps.  Let me know if anything is unclear.
4 0
3 years ago
Other questions:
  • Pls answerrrrrrrrrrrrrrrrrrrrrrrrrrrrr​
    14·1 answer
  • What would happen to the size of the herbivore population if the producer population decreased?
    9·2 answers
  • What variable represents specific heat in the equation q = mct?
    11·1 answer
  • The balanced chemical equation for the combustion of methane is: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g) Which of the following sta
    6·1 answer
  • What is the missing component in the equation ATP<br> +P;+ energy?<br> AMP<br> ADP<br> ATP<br> NADP
    13·1 answer
  • What are some examples of how electrolysis is used in scientific research ?
    8·1 answer
  • Did the addition of salt change a physical or chemical property of water?
    12·1 answer
  • Carbon paired electrons
    15·1 answer
  • Forces start and change the motion of on object.<br> A: True<br> B: False
    15·2 answers
  • How much heat is required to boil 78.5 gg of water at its boiling point?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!