Scutt223 Scutt223
  • 29-04-2014
  • Chemistry
Answered

Boron found in nature has an atomic weight of 10.811 and is made up of the isotopes 10B (mass 10.013 amu) and 11B (mass 11.0093 amu). What percentage of naturally occurring boron is made up of 10B and 11B respectively?
a. 30:70
b. 25:75
c. 20:80
d. 15:85

Answer :

jwilck
jwilck jwilck
  • 29-04-2014
C 20:80 because the equation would be (10×.2)+(11×.8)
Answer Link

Other Questions

A bicameral legislature features
Dorothy types 120 words per minute How many words does Dorothy type in 175 minutes
Who fought in the Punic Wars A Rome and Greece B Athens and Sparta C Rome and Carthage D Rome and Egypt
write 3 23 as improper fraction
Which person was responsible for winning the English throne in the Battle of Hastings A John B Edward III C Richard the LionHearted D William the Conqueror
A computer with a domain name is called a
Is a cube a polygon Why or why not
an equilateral triangle has a perimeter of 60m and a height of 173m what is its area
For a regular 15gon a What is the sum of the measures of its interior angles b What is the measure of one interior angle c What is the sum of the measures of it
Which of the following statements about the presidency of Gerald Ford are accurate A Ford granted Nixon an unconditional pardon for any wrongdoings against the