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
nadezda [96]
3 years ago
15

Based on table N of the reference tables what is the number of hours required for 42k (potassium -42) to undergo three half-life

periods
Chemistry
1 answer:
skelet666 [1.2K]3 years ago
3 0

The number of hours required : 37.2 hours

<h3>Further explanation</h3>

Given

⁴²K (potassium -42)

Required

The number of hours

Solution

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.  

Usually, radioactive elements have an unstable atomic nucleus.  

Based on Table N(attached), the half-life for ⁴²K is 12.4 hours, which means half of a sample of ⁴²K will decay in 12.4 hours

For three half-life periods :

\tt 3\times 12.4=37.2~hours

You might be interested in
Acetyl-CoA labeled with 14C in both of its acetate carbon atoms is incubated with unlabeled oxaloacetate and a crude tissue prep
Bumek [7]

Answer:

a.all four carbon atoms.

Explanation:

Acetyl-CoA labeled with 14C in both of its acetate carbon atoms is incubated with unlabeled oxaloacetate and a crude tissue preparation capable of carrying out the reactions of the citric acid cycle. After one turn of the TCA cycle, oxaloacetate would have 14C in  all four carbon atoms.

5 0
2 years ago
What is a star, and how do they work
Hitman42 [59]

Answer:

a star is like the sun a burning ball of gas that gives light to the outer space.

Explanation:

8 0
2 years ago
Read 2 more answers
Please answer A S A P the send me the completed version
Murljashka [212]

Answer:

A DOCX file is a Microsoft Word document that typically contains text

4 0
2 years ago
Why does the sun appear very large compared to the other stars
Ivanshal [37]

Answer:

the other stars are much farther away from Earth than our sun

6 0
2 years ago
When 55.0 grams of metal at 75.0°C is added to 100. grams of water at 15.0°C, the temperature of the water rises to 18.7°C. Assu
olga2289 [7]

Answer:

The specific heat of the metal is 0,50 J/gºC

Explanation:

Assume that no heat is lost to the surroundings

(Q = m . C . ΔT)metal + (Q = m . C . ΔT)water = 0

Let's replace our values.

55g . C . (18,7ºC - 75ºC) + 100g . 4,184 J/g·°C . (18,7ºC - 15ºC) = 0

55g . C . -56,3 ºC + 418,4J/·°C . 3,7ºC = 0

-3096,5 gºC . C + 1548,08 J = 0

1548,08 J = 3096,5 gºC . C

1548,08 J / 3096,5 gºC  = C = 0,50 J/gºC

8 0
3 years ago
Other questions:
  • When determining the formula for a compound, it is important to know the valence numbers of each element. Suppose you want to wr
    9·1 answer
  • When a chemical reaction releases energy it is called what
    7·2 answers
  •    ...............................
    12·1 answer
  • Two objects with the same temperature must have an equal quantity of heat. True False
    12·1 answer
  • Find the density of an empty tissue box with a mass of 345 grams and a volume of 1125 cm3.
    11·1 answer
  • Write a balanced chemical equation for the combustion reaction of hydrogen and oxygen to give water
    6·1 answer
  • Calculate the number of atoms in 3mol helium
    15·1 answer
  • Which of the following are macro molecular colloids ?
    10·1 answer
  • When the heat wave passes and temperatures
    9·2 answers
  • A synthesis reaction takes place when carbon monoxide (CO) and hydrogen gas (H2) react to form methanol (CH3OH). How many grams
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!