physical chemistry

indium(atomic wt.= 114.82 u ) has two naturally occuring isotopes, the predominant one from has isotopic wt. 114.9041 and abundance of 95.72%. which of the following isotopic wt. is the most likely for the other isotope?

1. 👍 3
2. 👎 2
3. 👁 1,862
abundance first isotope = 95.72%
abundance other isotope is 100-95.72 = 4.28%
Let x = mass other isotope

(114.9041*0.9572) + (x*0.0428) = 114.82
Solve for x

1. 👍 8
2. 👎 3
2. 112.94

1. 👍 3
2. 👎 3
3. Let atomic weight of other isotope is M

114.82= 114.9041×95.72 + 4.28×M ÷ 100

M = 112.94

1. 👍 9
2. 👎 3
posted by Smriti
4. Jdjgjdwk

1. 👍 3
2. 👎 4
5. 112.94

1. 👍 3
2. 👎 0

Similar Questions

1. Chemistry H.

Indium has two naturally occurring isotopes and an atomic mass of 114.818 amu. In- 113 has a mass of 112.904 amu and an abundance of 4.3%. What is the identity and percent abundance of indium's other isotope. I am very confused on

asked by Jennifer on September 23, 2012
2. Chemistry

This Chem problem is really difficult -Need help please! Magnesium Consists of three naturally occuring isotopes. The percent abundance of these isotopes is as follows: 24Mg(78.70%), 25Mg(10.13%) and 26Mg(11.7%). The average

asked by Mary Joy on September 27, 2012
3. chemistry

Naturally occuring boron is composed of only two isoptopes 10/5B and 11/B with isotopic masses of 10.0129 and 11.00931 respectively. To account for the atomic mass of 10.811 what must be the percentage abundance of each isotope?

asked by felpin on October 27, 2011
4. Chemistry

I just need help with this one question, and then once I know how to do the steps, I think can do the others. --- The average atomic mass of argon is 39.95 u. Natural argon contains three isotopes: Ar-36 (35.967 u), Ar-38 (37.962

asked by Lucy on September 17, 2007
5. general chemistry

naturally occuring chlorine is composed of 35CL with atomic mass of 34.969 37CL with atomic mass of 36.966 the average atomic mass id 35.453 what are the percantages of each isotope in naturally occuring chlorine ?

asked by Alaa on March 25, 2011
1. chemistry

Naturally occuring boron is 80.20% boron-11 and 19.80% of some other isotopic form of boron. What must be the atomic mass of this second isotope be in order to account for the 10.81 amu average atomic mass for boron?

asked by Ben on October 10, 2010
2. Chemistry

The element boron has three naturally occuring isotopes. One has the atomic mass 10.0129(54.4%), another 11.0093(12.75%). What is the atomic mass of the third isotope if the average atomic mass of boron is 10.811?

asked by Anonymous on October 20, 2013
3. chemistry

The element copper has naturally occuring isotopes with mass numbers of 63 and 65. The relative abundance atomic masses are 69.2% for mass=62.93 amu, and 30.8% for mass=64.93 amu. Calculate the average atomic mass of copper.

asked by henry on September 7, 2009
4. chemistry

Gallium is a metal with a wide variety of uses. Some of its applications include computer memory chips, light emitting diodes and lasers. Radioactive isotopes of gallium are used to image the human body and locate tumors.

asked by billy on August 29, 2014
5. Chemistry

There are three naturally occurring isotopes of the hypothetical element hilarium 41Hi, 42Hi, and 44Hi. The percentages of these isotopes are the following: Hilarium Natural Isotopes Abundance 41Hi 18.7% 42Hi 43.6% 44Hi 37.7% You

asked by anonymous on August 22, 2016

More Similar Questions