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
const2013 [10]
3 years ago
14

A meteor contains 0.556 g of pb-206 to every 1.00 g of u-238. assuming that the meteor did not contain any pb-206 at the time of

its formation, determine the age of the meteor. u-238 decays to pb-206 with t1/2 = 4.5 x 109 y
Chemistry
1 answer:
vivado [14]3 years ago
5 0
Answer is: 2,94·10⁹ years.
m(Pb) = 0,556 g.
n(Pb) = m÷M = 0,556g÷206g/mol = 0,0027mol.
m(Au) = 1,00g.
n(Au) = 1g÷238g/mol =0,0042mol.
n(Pb)/n(Au) = 0,575
t1/2 = 4,5·10⁹ years.
λ = 0,693÷t1/2, λ = 0,693÷4,5·10⁹ = 0,154·10⁻⁹.
λ-decay constant
Use this formula: λ·t = ln(1+ n(Pb)/n(Au)
ln - <span>natural log.
</span>t = 0,453÷0,154·10⁻⁹ = 2,94·10⁹ years.


You might be interested in
Which type of radioactive emission has a positive charge and weak penetrating power?
vladimir2022 [97]
1. The Alpha particle is a helium nucleus, is positively charged & would barely penetrate a piece of paper.<span />
3 0
3 years ago
“Dry ice” is the solid form of carbon dioxide. Determine the number of mass of CO2 gas in grams that are present in 61.8 L of CO
Fofino [41]

Answer:

Mass  = 121 g

Explanation:

Given data:

Mass in gram of CO₂ = ?

Volume = 61.8 L

Pressure = standard = 1 atm

Temperature = 273.15 K

Solution:

Formula:

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

1 atm × 61.8 L = n ×0.0821 atm.L/ mol.K   × 273.15 k

61.8 L.atm = 22.42 atm.L/ mol × n

n = 61.8 L.atm /22.42 atm.L/ mol

n = 2.76 mol

Mass in gram:

Mass =  number of moles × molar mass

Mass = 2.76 mol × 44 g/mol

Mass  = 121 g

6 0
2 years ago
How many grams of NO can be made from 50 g of NH3?<br><br> 4 NH3 + 5 O2 → 6 H2O + 4 NO
Evgen [1.6K]
0.08 because 4mol NO divided by 50g gives you your answer
4 0
2 years ago
Need help with chemistry
AlekseyPX

Answer:

you need to use the 2 because I already did it

Explanation:

db

3 0
2 years ago
Which microscope came out first
victus00 [196]

Answer:

compound microscope

Explanation:

6 0
3 years ago
Other questions:
  • To 25mL of 0.90M HCl, 275mL do distilled water is added. What is the molarity of the resulting solution?
    7·1 answer
  • Explain equilibrium based on collision theory.​
    10·1 answer
  • When ammonium nitrate is added to a suspension of magnesium hydroxide in water, the Mg(OH)2 dissolves. Write a net ionic equatio
    10·1 answer
  • Which of the following correctly describes solid, liquid, and gas states of matter?
    10·1 answer
  • The particles of longitudinal waves vibrate by pushing together and moving apart parallel to the direction in which the wave tra
    10·1 answer
  • A metal with a mass of 71.68G occupies a volume of 8.00 cm to the power of 3. What's the calculation of the density of the metal
    9·1 answer
  • Predict the formulas for calcium chloride and potassium phosphate
    15·1 answer
  • What type of reaction is Mg + 2Ag -&gt; mg2 + 2Ag
    10·1 answer
  • What is the positive effect of composed fertilizer?
    15·1 answer
  • Which element can form an oxide with the general formula m2o or mo where m is a metal
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!