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
romanna [79]
2 years ago
13

A sample of uranium ore contains 6.73 mg of 238U and 3.22 mg of 206Pb. Assuming all of the lead arose from the decay of the uran

ium and that the half-life of 238U is 4.51 x 109years, determine the age of the ore
Chemistry
1 answer:
bearhunter [10]2 years ago
5 0

Answer:

The age of the ore is 4.796*10^9 years.

Explanation:

To solve this question, we use the formula;

A(t) =A(o)(1/2)^t/t1/2

where;

A(t) =3.22mg

A(o) = 6.731mg

t1/2 = 4.51*70^9 years

t = age of the ore

So,

A(t) =A(o)(1/2)^t/t1/2

3.22 = 6.73 (1/2)^t/4.51*10^9

Divide both sides by 6.73

3.22/6.73= (1/2)^t/4.51*10^9

0.47825= (0.5)^t/4.51*10^9

Log 0.4785 = t/4.51*10^9 • log 0.5

Log 0.4785/log 0.5 • 4.51*10^9 = t

t = 1.0634 * 4.51*10^9

t = 4.796*10^9

So therefore, the age of the ore is approximately 4.796*10^9 years.

You might be interested in
How many grams of barium chloride (BaCl2) are there in 0.187 mol?<br> 0.187 mol
igor_vitrenko [27]

Answer:

38.9 grams of BaCl_2

Explanation:

0.187 mol BaCl2 x \frac{208 g}{1 mol}

0.187 m x 208 g/m

0.187 x 208 g

38.896 g --> 38.9 g BaCl2

8 0
3 years ago
Convert 7.02 mol of NaCl to formula units??
nika2105 [10]

<span>To convert the number of moles a compound to formula units, the conversion factor is Avogadro's number, 6.022 x10^23 formula units/ mol. In this case, we are given with 7.02 moles of sodium chloride. Hence the answer is 4.23 x 10^24 formula units.</span>

8 0
2 years ago
¿Cuál de las siguientes configuraciones globales corresponde a un elemento químico que se comporta como metal? 1 punto [He]2s2 2
yuradex [85]

Answer:

[Ne]3s2

Explanation:

ahora tenemos que mirar cada una de las configuraciones electrónicas de cada átomo de cerca antes de tomar una decisión.

considerando la configuración electrónica más externa de cada una de las especies mostradas;

para la primera configuración, ns2 np6 corresponde a un gas noble.

para la segunda configuración ns2 np3 corresponde a un elemento no metálico del grupo 5.

para la tercera configuración, ns2 corresponde a un elemento metálico del grupo 2.

para la cuarta configuración, ns2 np4 corresponde a un elemento no metálico del grupo 6

5 0
3 years ago
During which phase of mitosis does the cell begin to split into two daughter cells
artcher [175]

Answer:

\text{Telophase}

Explanation:

<em>Telophase is the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.</em>

<em />

<em />-TheAnimeGirl-<em />

3 0
2 years ago
Read 2 more answers
Find surface phenomena from the following order: spherical form of drops, crystal growth, absorption, osmosis, colligative prope
Volgvan

Answer:

spherical form of drops, crystal growth, absorption, osmosis, colligative properties, diffusion, adsorption, hemosorption.

7 0
3 years ago
Other questions:
  • For ethanol, propanol, and n-butanol the boiling points, surface tensions, and viscosities all increase. What is the reason for
    11·1 answer
  • Helpmeh on this question
    12·2 answers
  • Which of the following shows the balanced equation for the reaction that represents the decomposition of barium carbonate (BaCO3
    9·2 answers
  • How do I write 2.345 X 10^-4cm out of scientific notation?
    9·1 answer
  • You decide to boil water to cook noodles. You place the pan of water on the stove
    9·1 answer
  • Write a balanced net ionic equation for the reaction between K3PO4 (aq) (potassium phosphate) and Fe(NO3)2 (aq) (iron (II) nitra
    5·1 answer
  • When a mixture of iron powder and sulphur is heated it glows more brightly than that of iron filings and sulphur.Explain this ob
    7·1 answer
  • Which process passes genetic material to offspring
    12·1 answer
  • A certain chemical reaction releases of heat for each gram of reactant consumed. How can you calculate what mass of reactant wil
    9·1 answer
  • Please answer A S A P the send me the completed version
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!