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
Flauer [41]
3 years ago
15

In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six neutrons. What is the mass number of

each boron isotope? Sketch a sample of 10 atoms that is nearly representative of a natural sample. What is the average mass of the atoms in your drawing? What is the atomic mass of boron? (Boron-10 has a mass of 10.01294 amu and boron-11 has a mass of 11.00931 amu.)
Chemistry
1 answer:
Delvig [45]3 years ago
3 0

Answer:

Mass of Boron with 5 neutrons = 10.07975 amu.

Mass of Boron with 6 neutrons = 11.08842 amu.

Average mass of the 10 atoms = 10.886686 amu.

Atomic mass of Boron = 10.81203 amu.

Explanation:

Boron has an atomic number equal to 5, so it has 5 protons in its nucleus. The mass number is given by the sum of the mass of protons and neutrons.

One proton has 1.00728 amu, and 1 neutron has 1.00867. So, the mass of the isotope which has 5 neutrons is:

Mass = 5x1.00728 + 5x1.00867 = 10.07975 amu

And the mass of the isotope with 6 neutrons is:

Mass = 5x1.00728 + 6x1.00867 = 11.08842 amu.

With 10 atoms of boron, 2 (19.8%) will have 5 neutrons and will have a mass equal to 10.07975 amu, and 8 (80.2%) will have 6 neutrons and mass equal to 11.08842 amu. So, the average mass is:

Average mass = (2x10.07975 + 8x11.08842)/10

Average mass = 10.886686 amu.

The atomic mass of Boron will be the average mass of its isotopes. So, for the mass of the isotope given, the atomic mass will be:

atomic mass = 0.198x10.01294 + 0.802x11.00931

atomic mass = 10.81203 amu.

You might be interested in
The SI unit of pressure is the ______________.
steposvetlana [31]

The answer is Pascal

5 0
3 years ago
Read 2 more answers
How many non-bonding electrons does phosphorus have?
Eddi Din [679]
10 non-bonding electrons 
8 0
3 years ago
Read 2 more answers
What is the mass of 0.45 moles of Sodium?
ch4aika [34]

Answer:

10.35

Explanation:

multiply moles by molar mass from periodic table

3 0
2 years ago
Light travels as a/an___________
Debora [2.8K]
Answer:

D. Electromagnetic
5 0
3 years ago
Read 2 more answers
Asap... define pure substances...​
gtnhenbr [62]

A pure substance refers to an element or a compound that has no component of another compound or element. Pure substances are made of only one type of atom or molecule. Hydrogen gas and pure iron are examples of pure substances. Hydrogen consists of hydrogen atoms only while iron consists of only iron atoms. Mixing two pure substances results in a mixture. To separate the two, scientists use a method known as filtration. Mixtures can either be homogeneous or heterogeneous. The measure used to determine how pure a substance may be called purity. Besides hydrogen and iron, other pure substances include gold, diamonds, sugar, and baking soda.

3 0
3 years ago
Read 2 more answers
Other questions:
  • In order to digest food, the human body requires ​
    12·1 answer
  • 1.For the reaction P4 O10(s) + 6H2O(l) → 4H3PO4(aq), what mass of P
    15·2 answers
  • What are the classes of alkanol
    8·1 answer
  • What statement describes a good scientific question? Check all that apply.<br>Please help mee!​
    8·1 answer
  • Calcule la normalidad de una solución
    6·1 answer
  • 50 points guys please help me!!!!!!
    6·1 answer
  • Karl went to the doctor complaining of a sore throat. The doctor performed
    5·1 answer
  • Which one will fill up first?? and explain how?,​
    8·2 answers
  • 30 points! pls help me! (question is in image) explanation needed!!!
    7·2 answers
  • Calculate the mean rate of reaction when 23 cm<br> of gas<br> is produced in 15 seconds.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!