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. Ammonia, NH3, is a typical ingredient in household cleaners. It is produced through a combination reaction involving N2(g) an
hram777 [196]
N2 + 3H2 ----> 2NH3 

<span>you can see 3 moles H2 reacts to form 2 moles NH3 </span>
<span>Therefore moles NH3 = 2 / 3 x moles H2 </span>
<span>= 2/3 x 12.0 mol </span>
<span>= 8.00 mol NH3 hope this help</span>
6 0
3 years ago
Read 2 more answers
The correct labels for the numbers in Figure 7-1 are (1) ____________________, (2) ____________________, and (3) _______________
Scrat [10]

Answer:

A horizon, B horizon, C horizon .

6 0
3 years ago
10 atoms of aluminum reacts with 6 molecules of oxygen gas to produce aluminum oxide. 4 Al + 3 O2 ––&gt; 2 Al2O3 What is the exc
Mrrafil [7]

The excess reactant is Aluminum.

<u>Explanation:</u>

We have to write the balanced equation as,

4 Al+ 3 O₂ → 2 Al₂O₃

According to the molar ratio 4: 3, from the given balanced equation, we can say that 4 atoms of Al reacted with 3 molecules of oxygen.

Given that 10 atoms of aluminum reacts with 6 molecules of oxygen, as per the ratio only 8 atoms of Aluminum is required to react with 6 molecules of oxygen, so excess reactant is Aluminum.

8 0
3 years ago
What is the volume of 80.0 g of ether if the density is 0.70 g/ml
My name is Ann [436]
I need to find the x pls help and show work 73838
6 0
3 years ago
Convert 4.0 cm to mm.
BabaBlast [244]

Answer: 40mm

Explanation:

You would multiply 4.0 by 10.

5 0
3 years ago
Other questions:
  • What is the original source of energy that is stored in the food that animals eat?
    11·1 answer
  • Why is studying light and electrons important for chemistry and understanding the universe?
    5·1 answer
  • A reaction requires 15.0 g of ammonium chloride. What volumeof a
    6·1 answer
  • Consider the total ionic equation below.
    7·1 answer
  • What type of reaction occurs between aqueous ammonia solution and an acid?
    10·2 answers
  • a solution contains 2.1 moles of HCl and has a molarity of 6.00 M what volume of the solution occupy.
    9·1 answer
  • Explain how temperature and mass affect the appearance of stars
    8·1 answer
  • Is the answer B? Help
    7·1 answer
  • A balloon has a volume of 2.00 liters at STP. What will happen to the balloon's
    11·1 answer
  • When potassium permanganate is stirred in water, it turns to purple. How would
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!