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
Furkat [3]
3 years ago
12

The element lead (Pb) consists of four naturally occurring isotopes with atomic masses 203.97302,205.97444,206.97587, and 207.97

663 amu. The relative abundances of these four isotopes are 1.4,24.1,22.1, and 52.4 %, respectively. From these data, calculate the atomic weight of lead.
Chemistry
1 answer:
Sphinxa [80]3 years ago
4 0

Answer:

The atomic weight of lead is 207.2169 amu

Explanation:

Step 1: Data given

Lead has 4 isotopes:

⇒ 203.97302 = 1.4 %

⇒ 205.97444 = 24.1 %

⇒ 206.97587 = 22.1 %

⇒ 207.97663 = 52.4 %

Step 2: Calculate the atomic weight of lead

Atomic weight = 203.97302 * 0.014 + 205.97444*0.241 + 206.97587 *0.221 + 207.97663 * 0.524

Atomic weight = 207.21688371  ≈ 207.2169 amu

The atomic weight of lead is 207.2169 amu

You might be interested in
Is mendelevium flammable
Alik [6]
No it is not flammable
6 0
2 years ago
If the change in entropy of the surroundings for a process at 451 k and constant pressure is -326 j/k, what is the heat flow abs
Arisa [49]

If the change in entropy of the surroundings for a process at 451 k and constant pressure is -326 j/k, then heat flow absorbed (in kj) by the system is -147.026kJ.

<h3>What is entropy? </h3>

The entropy of particle is defined as how random it move. It shows the randomness of the system or may be disorders of the system. It is used to measure the unavailable energy for performing useful work.

Unit of entropy = J/K

<h3>Formula:</h3>

∆s = ∆Q/T

where,

∆s = change in entropy of the surrounding = -326J/K

∆Q = heat absorbed from surrounding

T = Temperature = 451K

∆Q = ∆s × T

∆Q = -326 × 451

∆Q = 147,026 J

∆Q = 147.026 kJ

Thus we find that the heat absorbed by the system is 147.026 kJ.

learn more about entropy:

brainly.com/question/14131507

#SPJ1

8 0
1 year ago
10 POINTS : What are 4 things created from Big Bang?
Leno4ka [110]

Answer:

:0

Explanation:

One second after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos.Jun 17, 2017

6 0
3 years ago
How many grams of oxygen are produced when 1.05 moles of hydrogen gas is<br> produced?
vivado [14]

Answer:

1.058337 grams of hydrogen and 2H2 + O2 ==> 2H2O hydrogen peroxide

mols H2 = grams/molar mass

Using the coefficients in the balanced equation, convert mols H2 to mols O2.

Now convert mols O2 to grams. That's grams mols O2 x molar mass O2.

and it could also produce H2O water but no air but it could make other things

8 0
2 years ago
Plz help me guys<br><br> A<br><br> B<br><br> C<br><br> D
Taya2010 [7]

Answer:

C

Explanation:

I think

3 0
3 years ago
Other questions:
  • What is the equilibrium constant expression for the reaction 2no2 --&gt; 2no + o2?
    9·1 answer
  • Convert the following: 100 hg(hectograms) to g(grams)
    11·2 answers
  • Sulfuric acid was once produced through the reaction of sulfur trioxide with water. Sulfur trioxide can form through the reactio
    7·2 answers
  • 1. Compare and contrast substances and mixtures. Give<br>two examples of each.<br>​
    13·1 answer
  • 2. Using the following data, calculate the average atomic mass of magnesium (give your answer to the nearest
    9·1 answer
  • Calculate the amount of energy when water at 72 degrees c freezes completely at 0 degrees c
    13·1 answer
  • Cite as principais características das tentativas de organização da Tabela periódica-Tríades de Dobereiner, o Parafuso Telúrico
    12·1 answer
  • How many grams are in 2.4 moles of calcium chloride
    6·1 answer
  • Look at this image what type of galaxy is shown? A. barred B. elliptical C. irregular or D. spiral.
    15·2 answers
  • Calculate the solubility of copper(II) hydroxide, Cu(OH)2, in g/L​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!