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
svetlana [45]
2 years ago
11

The half-life of C-14 is 5470 years. If a particular archaeological sample has one-quarter of its original radioactivity remaini

ng,what is the best estimate for its age?
Chemistry
1 answer:
Gennadij [26K]2 years ago
3 0

Answer:

When there remains one-quarter of the sample, the age of the sample is 10940 years

Explanation:

<u>Step 1:</u> Data given

The half-life of C-14 is 5470 years.

The half- life time is the time required for a quantity to reduce to half of its initial value.

This means after 5470 years there remains half of the C-14 sample.

To remain a quarter of the sample, another cycle of 5470 years is required.

This means 2 half-lives should have passed to remain a quarter of the sample.

<u>Step 2</u>: Calculate it's age

t/(t/1/2) = 2

⇒ with t = the age (or time) of the sample

⇒ with t(1/2) = the half-life time of the sample = 5470 years

⇒ with 2 = the number of halvf- lives passed

t/5470 = 2

t = 2*5470 = 10940 years

When there remains one-quarter of the sample, the age of the sample is 10940 years

You might be interested in
What is the compound name for the ion chemical formula AgBr?
Gnom [1K]

Answer:

Silver bromide.

Explanation:

4 0
3 years ago
What kind (ionic or covalent) bond is FeCl2 + Na2CO3? (iron (II) chloride + sodium carbonate).
kipiarov [429]

Answer:

corbonate

Explanation:

i think so. not sure

6 0
2 years ago
WILL MARK BRAINLIST
Free_Kalibri [48]

Answer:

The average speed must be 30mph so this means the car traveled for 2hrs 60/30

7 0
2 years ago
Cu + 2AgNO3 es002-1.jpg 2Ag + Cu(NO3)2 How many moles of copper must react to form 0.854 mol Ag?
marin [14]
Balance Chemical Equation is as follow,

<span>                        Cu + 2 AgNO</span>₃     →    2 Ag + Cu(NO₃)₂

According to Balance Equation,

                   2 Moles of Ag is produced by reacting  =  1 Mole of Cu
So, 
     0.854 Moles of Ag will be produced by reacting  =  X Moles of Cu

Solving for X,
                             X  =  (0.854 mol × 1 mol) ÷ 2 mol

                             X  =  0.427 Moles of Cu
Result:
            0.854 Moles of Ag 
are produced by reacting 0.427 Moles of Cu.
4 0
3 years ago
Which element has exactly five electrons in the highest principal energy level (the outer shell)?
statuscvo [17]
This question is asking for an element with 5 valence electrons.  Just go to the row it is in (excluding transition metals) and count over.  
The answer would be c. P
7 0
3 years ago
Read 2 more answers
Other questions:
  • Given that mass was lost from the copper (ii) carbonate hydroxide hydrate during heating, in this decomposition reaction, how ma
    5·1 answer
  • What atoms are found in the phosphate group?
    6·2 answers
  • Which of the following would be considered a solution?
    8·1 answer
  • The half-reactions involved in the lactate dehydrogenase (ldh) reaction and their standard reduction potentials are
    5·1 answer
  • Alpha-mannosidase follows Michaelis-Menten kinetics. A 3 micromolar solution of alpha-mannosidase catalyzes the formation of .66
    8·1 answer
  • Does the amount of Borax added change the slime?
    12·1 answer
  • How do you solve this
    14·1 answer
  • Whats minimum temperature for scrabble eggs
    12·2 answers
  • Chrissy is doing her chemistry homework and comes across the chemical formula for 3 molecules of nitric acid, represented by 3HN
    13·1 answer
  • What is the molar mass of cholesterol if 0.00105 mol weighs 0.406 g?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!