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
Goryan [66]
2 years ago
15

What is the half life of the element in the picture HELP BRAINLIEST

Chemistry
1 answer:
stira [4]2 years ago
5 0

Answer:

6 days

Explanation:

The following data were obtained from the question:

Original amount (N₀) = 100 mg

Amount remaining (N) = 6. 25 mg

Time (t) = 24 days

Half life (t½) =?

Next, we shall determine the decay constant. This can be obtained as follow:

Original amount (N₀) = 100 mg

Amount remaining (N) = 6. 25 mg

Time (t) = 24 days

Decay constant (K) =?

Log (N₀/N) = kt / 2.303

Log (100/6.25) = k × 24 / 2.303

Log 16 = k × 24 / 2.303

1.2041 = k × 24 / 2.303

Cross multiply

k × 24 = 1.2041 × 2.303

Divide both side by 24

K = (1.2041 × 2.303) / 24

K = 0.1155 /day

Finally, we shall determine the half-life of the isotope as follow:

Decay constant (K) = 0.1155 /day

Half life (t½) =?

t½ = 0.693 / K

t½ = 0.693 / 0.1155

t½ = 6 days

Therefore, the half-life of the isotope is 6 days

You might be interested in
What's an element in period 5 with larger radius than Yttrium?
eimsori [14]
Rubidium or strontium have larger a larger atomic radius since the further left on the periodic table you go, the larger the sizes of the atoms are.  This trend can be explained through effective nuclear charge which explains how the further left and down you go, the less the atoms nucleus is able to pull in the electrons around it.<span />
7 0
3 years ago
8. When a 2.5 mol of sugar (C12H22O11) are added to a certain amount of water the boiling point is raised by 1 Celsius degree. I
Julli [10]

Hey there!:

8) ΔTb = i*Kb*m  

 m is molality

 Since same number of mol is added to same amount of water in both cases

m will be same for both

is 1 for glucose since it is covalent compound

is 4 of Al(NO3)3 as it breaks into 1 Al₃⁺ and 3 NO₃⁻

So,  ΔTb will be 4 times in aluminum nitrate case

So, boiling point will change by 4ºC


9) use Q = m*  L

L =  heat of vaporization so:

T1=T2=100ºC

5.40 * 1000 => 5400  cal/g

Q =   5400 / 540

Q = 10 grams


Hope that thlps!

5 0
3 years ago
What are chemical reaction​
scoray [572]
  • The reaction in which we can't take back the product to reactant form .Or in simple words the reaction which is irreversible is called chemical reaction

Example:-

  • Burning of wax

We cannot pull back the reaction to get wax back .

3 0
2 years ago
Read 2 more answers
A ____________ is a large body that moves around a star?
Travka [436]

Answer:

A Planet

Explanation:

The earth for example, is a large body that orbits the sun, our local star

4 0
3 years ago
Read 2 more answers
An airplane starts at rest and Excelerator down the runway for 20 seconds. At the end of the runway, its velocity is 80 m/s Nort
masha68 [24]
According to the formula you have given us to work with . . .

1). The airplane's acceleration is

(80 m/s north - zero) / (20 sec) = 4 m/sec^2 north

2).  For the cyclist:

                                          (V-final - zero) / 20sec = 0.5 m/s^2 south

Multiply each side by 20s :  V-final = 0.5 m/s^2 south x (20sec) = 

                                                                                         10 m/s south

8 0
3 years ago
Other questions:
  • A 50.0g g sample of 16n decays to 12.5g in 14.4 seconds. What is its half life
    15·1 answer
  • How many significant figures does the number 0.00650<br> have?
    12·2 answers
  • How many atoms are in a sample of 72.8 g calcium (Ca)?
    15·2 answers
  • A car travelling at 50m/s produces a force of 200N. What is the power of the engine in kilowatts(KW).
    13·2 answers
  • Determine the [H3O+] in a 0.265 M HClO solution. The Ka of HClO is 2.9 × 10-8.
    14·1 answer
  • How are groundwater and surface water related?
    12·2 answers
  • Magbigay ng 3 halimbawa ng lipunang sibil. Paki sagot ng wasto plies &gt;_&lt;​
    8·1 answer
  • Which part of a cell synthesises proteins?
    6·1 answer
  • What is the method use to separate sand and water​
    6·1 answer
  • During photosynthesis, what gas do plants release
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!