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
Greeley [361]
3 years ago
11

An archaeologist discovered some charcoal at an excavation site. He sent the samples to a lab for C-14 dating, knowing that the

half-life of C-14 is approximately 5,600 years. The lab reported that the charcoal had 1/8 the amount of C-14 in it that a living sample would have. How many years old
was the charcoal?
A. 700 years
B. 1,867 years
C. 8,400 years
D. 16,800 years
E. 44,800 years
Chemistry
1 answer:
klio [65]3 years ago
7 0
Here we assume that disintegration has occur so the normal t½ formular will not be used
mathematically we..⅛×5600 =700
therefore it is about 700years option A
You might be interested in
A teacher makes the following statement.
melamori03 [73]
The correct answer among the choices given is the first option.The teacher most likely is talking about distillation of a mixture. Distillation is a unit operation that separates component substances from a liquid mixture which is shown by the teacher. Also, the most common purifying technique in the production of gasoline is by this process.
5 0
3 years ago
Read 2 more answers
What happens when HCl gas is passed through a saturated PbCl2 solution?
VikaD [51]
When HCl is added to a saturated solution of PbCl2, the solubility of PbCl2 would decrease so precipitation would occur. The decrease in the solubility is due to the common ion effect or the presence of Cl- ions in both compounds.
3 0
3 years ago
The amount of energy it takes to remove an electron from an atom is
lara31 [8.8K]
<span> the first ionization </span>energy<span> of an element is the </span>energy<span> needed to</span>remove<span> the outermost, or highest </span>energy<span>, </span>electron<span> from a neutral </span>atom<span> in the gas phase.</span>
3 0
3 years ago
Formula D = m / V m = 22 g D = 4 g/mL What is the Volume of the object in mL? Do not include the units in your answer.
Lemur [1.5K]

Answer:

The answer is

<h2>5.50</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density}  \\

From the question

mass = 22 g

density = 4 g/mL

The volume is

volume =  \frac{22}{4}  =  \frac{11}{2}  \\

We have the final answer as

<h3>5.50 mL</h3>

Hope this helps you

6 0
3 years ago
Which is the physical property of ionic compounds in their solid state?
Inga [223]
They are hard solid with a crystal lattice structure... with high melting points
4 0
3 years ago
Other questions:
  • The formation of a gas or a precipitate may be evidence for a ___________.
    15·1 answer
  • Which of these compounds hast the highest melting point <br> CCl4<br> CBr4<br> CH4<br> CF4<br> CI4
    8·1 answer
  • Which of the following is an example of land used as a protected area
    9·1 answer
  • What are the factors that affect the rate of dissolution? color, temperature, stirring texture, surface area, stirring temperatu
    12·2 answers
  • Why dilute H2SO4 is added to oxali acid solution in redox reaction​
    6·1 answer
  • 8SnCl4<br> How many atoms
    9·1 answer
  • Show your work with good use of units, rounding, and significant figures. [Hint: it is good practice to show the value of your a
    13·1 answer
  • Iron is extracted from its ore (hematite) in the blast furnace. Which gas is produced as a waste product?
    10·1 answer
  • What is the difference between the number of electrons in an atom of tin (Sn) and the number of electrons in an atom of oxygen (
    11·1 answer
  • List 10 ways a small community can conserve energy and recourses??
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!