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
tiny-mole [99]
3 years ago
15

A 50.0g g sample of 16n decays to 12.5g in 14.4 seconds. What is its half life

Chemistry
1 answer:
mixas84 [53]3 years ago
8 0
T is amount after time t 
<span>Ao is initial amount </span>
<span>t is time </span>
<span>HL is half life </span>

<span>log (At) = log [ Ao x (1/2)^(t/HL) ] </span>
<span>log (At) = log Ao + log (1/2)^(t/HL) </span>
<span>log (At) = log Ao + (t/HL) x log (1/2) </span>

<span>( log At - log Ao) / log (1/2) = t / HL </span>
<span>log (At/Ao) / log (1/2) = t / HL </span>

<span>HL = t / [( log (At / Ao)) / log (1/2) ] </span>

<span>HL = 14.4 s / [ ( log (12.5 / 50) / log (1/2) ] </span>

<span>HL = 14.4 s / 2 = 7.2 seconds </span>
You might be interested in
Answer the questions in the table below about the shape of the phosphorus hexachloride (PCI^1_6) anion. What word or two-word ph
REY [17]

Shape of PCl₆⁻¹, is octahedral.

Hybrdisation of PCl₆⁻¹ is sp³d².

This can be seen the image attached.

The angle between phosphorous and chlorine is 90⁰C. As it has octahedral geometry.

So the answer is as follows:

Shape of PCl₆⁻¹, is octahedral.

Hybrdisation of PCl₆⁻¹ is sp³d².

The angle between phosphorous and chlorine is 90⁰C.

6 0
3 years ago
Katherine was given a tiny lamb by her uncle. The lamb was a runt and had to be fed by hand. Every 3 hours
lorasvet [3.4K]

Answer:

2.32 liters

Explanation:

you would just divide 24 by 3 which is 8 and multiply 290 by it which is 2320 and divide by 1000 which is 2.32

4 0
3 years ago
How many grams are in 5.60 moles of sodium hydroxide (NaOH)​
Illusion [34]

Answer: I believe it should be 224g.

Explanation: There are 40g for every one mole of NaOH, so multiply the two to get to 224. I hope that helps!

8 0
2 years ago
Read 2 more answers
Atoms of iron (fe) and sulfur (s) form iron sulfide (fes) when the iron atom donates electrons to the sulfur atom. the type of b
marysya [2.9K]

Answer:

               The type of bond formed in FeS would be <u>Polar Covalent Bond</u>.

Explanation:

Types of Bonds can be predicted by calculating the difference in electronegativity.

If, Electronegativity difference is,

               Less than 0.4 then it is Non Polar Covalent  Bond

               Between 0.4 and 1.7 then it is Polar Covalent  Bond

               Greater than 1.7 then it is Ionic  Bond

For Fe and S,

                   E.N of Sulfur           =   2.58

                   E.N of Iron              =   1.83

                                                  ________

                   E.N Difference            0.75          (Polar Covalent Bond)


4 0
3 years ago
How many gallons in 2 L bottle
zepelin [54]
0.528 us liquid gallon
4 0
2 years ago
Other questions:
  • For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)?You do not need to look up any values to answer t
    8·1 answer
  • Akira records the speed of a reaction, first without a catalyst, and then with a catalyst
    10·2 answers
  • Differentiate between Fundamental unit and derived unit​
    11·1 answer
  • Which of the following equations is balanced in a basic solution? A. ClO-(aq) + 2H-(aq) + 2e- Cl-(aq) + H2O(l) B. ClO-(aq) + H2O
    8·2 answers
  • Which of the following advances in food production were attributed to the Green Revolution of the 1960s and 1970s
    6·2 answers
  • What ion do acids release in solution? hydrogen hydroxide carbonate ammonium
    15·2 answers
  • The pressure exerted by a gas container depends on
    13·1 answer
  • What is the chemical name for OBr2?
    10·1 answer
  • What can the world of science learn by simulating these hurricane conditions?
    10·2 answers
  • BRAINLIEST + 20 POINTS
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!