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
lora16 [44]
2 years ago
5

6 The half-life of carbon-14 is 5,700 years. A sample of wood that originally contained 100 grams of carbon-14 now contains only

25 grams of carbon-14. Approximately how many years ago was this sample part of a living tree? * (6 Points)​
Chemistry
1 answer:
nikitadnepr [17]2 years ago
8 0

Answer:

The correct answer is - 10400 years.

Explanation:

Half-life an element is the time required to decay the half amount of the initial amount of the element.

Here, the initial amount n(i) = 100 gm

remained amount n(r) = 25 gm

then n =?

The formula for the calculating initial amount

n(i)=n(r)⋅2^n

n(i)=n(r)⋅2^n

n(i)/n(r) =2^n

puting value,

100/25 = 2^n

2^n = 4

n = 2

so to decay this amount there is two half life cycles involved,

Thus, time = 2*5700

= 10400 years.

You might be interested in
3. What determines the mass number of an element?<br> The mumhor of nrotons
ArbitrLikvidat [17]

Answer: The number of protons and the number of neutrons determine an element's mass number.

Explanation:

5 0
3 years ago
Read 2 more answers
In the oxidation reduction reaction 2FeCl2 + Cl2 = 2FeCl3 what substance is reduced? What substance is oxidized?
marishachu [46]

Answer:

Iron is oxidized while chlorine is reduced.

Explanation:

The oxidation reduction reactions are called redox reaction. These reactions are take place by gaining or losing the electrons and oxidation state of elements are changed.

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Consider the following reaction:

2FeCl₂  + Cl₂  →  2FeCl₃

in this reaction the oxidation state of iron is increased from +2 to +3. That's why iron get oxidized and it is reducing agent because it reduced the chlorine. The chlorine is reduced from -2 to -3 and it is oxidizing agent because it oxidized the iron.

2Fe⁺²Cl₂⁻²

2Fe⁺³Cl₃⁻³

The iron atom gives it three electrons to three atoms of chlorine and gain positive charge while chlorine atom accept the electron and form anion.

4 0
3 years ago
HELP ASAP
Ghella [55]

potassium reacts the most vigorously.

7 0
3 years ago
What is the difference between intrusive igneous rocks and extrusive igneous rocks? We just learned this and I still don’t know
Reil [10]
The major visible difference between<span> the two are crystal size, </span>intrusive rocks<span> have a larger crystal/grain texture due to the slow cooling of magma below the earth surface which encourages the growth of larger crystals, while </span>extrusive rocks<span>, because of the rapid cooling at/above the earth's surface does the opposite. Hope I helped</span>
7 0
3 years ago
Read 2 more answers
2.600 * 10 ^ - 5 * 6.100 * 10 ^ - 5 Express in scientific notation
Anna [14]

Answer:

hope its help you

Explanation:

2.600 × 10^-5 × 6.100 × 10^-5 = 1.586 × 10-9

3 0
3 years ago
Other questions:
  • At a certain temperature, the equilibrium constant, K c , Kc, for this reaction is 53.3. H 2 ( g ) + I 2 ( g ) − ⇀ ↽ − 2 HI ( g
    13·1 answer
  • The reaction 2X →products is a second-order reaction, and the rate constant is 8.8 × 10−3 1/M·s. If the initial concentration of
    5·1 answer
  • Tentukan pH Mg(OH)2 jika ke dalam larutan MgCl2 0,2M ditambahkan NH4OH sehingga
    9·1 answer
  • What is needed in order to determine a mole ratio?
    14·1 answer
  • As a pendulum swing from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energ
    10·1 answer
  • What does Earth's hydrosphere include? the water on Earth the hard outer part of Earth the layer of gases surrounding Earth the
    6·2 answers
  • If the nucleus was the size of a tennis ball the atom would be the size of....?
    15·2 answers
  • What is the purpose of the scientific method?
    7·1 answer
  • What is the chemical name of the covalent compound SF6?
    7·1 answer
  • a chemical engineer has determined by measurements that there are moles of carbon in a sample of nickel tetracarbonyl. how many
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!