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
salantis [7]
2 years ago
5

what is the freezing point of a 0.195m aqueous solution of K2S? (Report amount to three decimal points)

Chemistry
1 answer:
Solnce55 [7]2 years ago
4 0
The freezing point depression of water is 1.86°C/m.kg 
<span>K2S dissociates: </span>
<span>K2S ↔ 2K+ + S 2- </span>
<span>1mol K2S will produce 3 mol of ions. </span>
<span>Therefore in the freezing point equation: i = 3 </span>
<span>Depression of freezing point = Kf * i* m </span>
<span>Depression of freezing point = 1.86*3*0.195 </span>
<span>Depression of freezing point = 1.088°C </span>
<span>The solution will freeze at - 1.088°C </span>
You might be interested in
the diagram shows light striking a pane of glass . some of the light is reflected , and some of the light is transmitted. the le
GrogVix [38]
When light crosses any barrier 
3 0
3 years ago
Open the Balancing Chemical Equations interactive and select Introduction mode. Then choose Separate Water. Adjust the coefficie
aleksklad [387]
<h2>H_2O  + H_2 + O_2</h2>

Explanation:

1. Water decomposition

  • Decomposition reactions are represented by-

       The general equation: AB → A + B.

  • Various methods used in the decomposition of water are -
  1. Electrolysis
  2. Photoelectrochemical water splitting
  3. Thermal decomposition of water
  4. Photocatalytic water splitting
  • Water decomposition is the chemical reaction in which water is broken down giving oxygen and hydrogen.
  • The chemical equation will be -

        H_2O  + H_2 + O_2

Hence, balancing the equation we need to add a coefficient of 2 in front of H_2O on right-hand-side of the equation and  2 in front of H_2 on left-hand-side of the equation.

     ∴The balanced equation is -

       2 H_2O → 2 H_2 + O_2

2. Formation of ammonia

  • The formation of ammonia is by reacting nitrogen gas and hydrogen gas.

      N_2 + H → NH_3

Hence, for balancing equation we need to add a coefficient of 3 in front of hydrogen and 2 in front of ammonia.

   ∴The balanced chemical equation for the formation of ammonia gas is as  follows -

     N_2+3H→ 2NH_3.

  • When 6 moles of N_2 react with 6 moles ofH_2 4 moles of ammonia are produced.

5 0
2 years ago
2. Name each of the following ionic compounds A. K2O B. Cacl2. C. Mg3N2 D. NaCIO E. KNO3​
Ludmilka [50]
A. Potassium oxide
B. Calcium chloride
C. Magnesium nitride
D. Sodium hypochlorite
E. Potassium nitrate
3 0
3 years ago
- Which of the following is an example of physical change?
dalvyx [7]
B as the glass just changes form as it shattered but the chemical composition is same as it was before
5 0
3 years ago
Kernel structure for manganese
Amanda [17]

Answer:

The nucleus consists of 25 protons (red) and 30 neutrons (blue). 25 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). Manganese is a transition metal in group 7, period 4, and the d-block of the periodic table. It has a melting point of 1246 degrees Celsius.

3 0
3 years ago
Other questions:
  • When the [H+] in a solution is 1.7 × 10−9 M, what is the pOH ?
    6·2 answers
  • Which chemical symbol describes an element?<br> o H2O<br> o 02<br> o CH4<br> o H2 SO4
    14·2 answers
  • A researcher claims that increasing temperature by 10 degrees will double the rate of an enzyme-catalyzed reaction. To test this
    10·1 answer
  • Smallest to largest: biome,population,organism,ecosystem,community
    15·1 answer
  • Which graph models the equation 3x-4y=12
    9·2 answers
  • The weight of an object never changes.<br><br> True<br> False
    9·2 answers
  • What quantity is represented by the metric system prefix deci-
    13·1 answer
  • 2. What happens to the temperature of air when it is compressed?​
    11·2 answers
  • HELPP PLEASE!!!WILL PROB GIVE BRAINLY!!! could someone please show a visual representation of 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
    13·1 answer
  • How many grams of aluminum would be in 3.0 moles of aluminum?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!