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
aleksklad [387]
3 years ago
15

S, selentum 83 has a half life

Chemistry
1 answer:
Sphinxa [80]3 years ago
4 0
The answer is 75 minutes.
You might be interested in
PLEASE HELP!!!The measurement of how fast an object moves over a certain amount of time.
ad-work [718]
1- <span>Acceleration
2- </span><span>Velocity
</span>3- <span>25 mph
4- </span><span>50 mph east
5- </span><span>Speed
6- 0
7- </span><span>It decreases
</span>
3 0
3 years ago
Read 2 more answers
Find the hydrogen ion concentration of a saturated solution of calcium hydroxide whose ph is 13. 1
salantis [7]

The pH of the solutions is 12.67.  

     

<h3>What is pH of a Solution?</h3>

pH is the measurement of how acidic or basic a solution is. The range of pH values is from 0 to 14. Lower pH values mean higher acidity, while higher pH means higher basicity. If the pH value is equal to 7, then the solution is neutral.

To calculate the pH of the solution, a few approaches are possible. Here, the pOH of the solution is calculated first using the molar concentration of  OH^{-1} ions. Because pH + pOH = 14, the pH of the solution can then be calculated by subtracting pOH from 14.

Because 2 moles of OH^{-1} ions are formed per mole of Ca(OH)_{2}dissolved, the pOH of a saturated Ca(OH)_{2} solution at  20^{.C} is,  

Concentration (C_{OH}) of OH^{-1} ions,

          C_{OH}   = 0.02335 mol Ca(OH)_{2}/L  X 2 mol OH^{-1} /1 mol Ca(OH)_{2}

            C_{OH} = 0.0467 mol OH^{-1}/L

*pOH of saturated Ca(OH)_{2} solution,

                                   pOH = -log [C_{OH}]

                                   pOH = -log [0.0467 mol OH^{-1}/L ]            

                                  pOH = 1.33  

*pH of saturated Ca(OH)_{2} solution,

                                   pH = 14 - 1.33

                                   pH = 12.67

Hence, the pH of the solutions is 12.67.

Learn more about  pH of the solutions here:

brainly.com/question/6988456

#SPJ4

4 0
2 years ago
Chromium is manufactured by heating a mixture of chromium(III) oxide with aluminium powder.
marshall27 [118]
I’m taking a good estimation and gonna say B but I’m torn between that and D
8 0
3 years ago
Which of these will reflect light with the highest frequency?
MArishka [77]
A blue candle because it is a light source vs another light source. Hope this Helps! :)

5 0
3 years ago
El resultado de (36-28-14)+(-6+10)x(5-8)-13x4=
myrzilka [38]

Explanation:

la respuesta/resultado es -54

8 0
2 years ago
Other questions:
  • The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its co
    14·1 answer
  • What other element had the same number of electrons as potassium??
    8·1 answer
  • Percent composition?: 85.05 g of Mg combines completely with 112.21 g of S.
    11·1 answer
  • Imagine two solutions with the same concentration and the same boiling point, but one has benzene as the solvent and the other h
    12·2 answers
  • The better we measure the better things ____
    10·1 answer
  • Dogs use the same glycolysis and cellular processes as humans use to produce ATP. A young dog has never had much energy. He is b
    8·1 answer
  • What is the volume of 1.2 moles of oxygen gas (o2) at 295 k and 1.2 atm? 18 l 22 l 24 l 78 l
    14·2 answers
  • PLEASE HELP MEEEEEEEEEEEEEEEEEEEEEEE
    7·2 answers
  • Write a word equation for the chemical reaction.<br><br> I’ll brainlist.
    7·1 answer
  • Balance the following chemical equation by providing the correct coefficients fe+h2so4 fe(so4)3 + h2
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!