top of page

Some information about the two naturally occurring isotopes of gallium is given in the table below.

June 2017 NY Regents Chemistry Exam




32 Some information about the two naturally occurring isotopes of gallium is given in the table below.



Which numerical setup can be used to calculate the atomic mass of gallium? (1) (0.6011)(68.926 u) + (0.3989)(70.925 u)

(2) (60.11)(68.926 u) + (39.89)(70.925 u)

(3) (0.6011)(70.925 u) + (0.3989)(68.926 u)

(4) (60.11)(70.925 u) + (39.89)(68.926 u)




Solution: To calculate the average atomic mass of an element, we take the atomic mass of each isotope and multiply by percent abundance in the decimal form ( divide by 100).

Answer: 1


Prepare for the Chemistry Regents Exam: HERE

Contact us for Regents Chemistry Tutoring: HERE

0 comments

留言

評等為 0(最高為 5 顆星)。
暫無評等

新增評等

Ready For Chemistry Tutoring?

I tutor all levels of chemistry including general and organic chemistry.

Click To Learn More

What subject are you taking?
Regents Chemistry
General Chemistry
Organic Chemistry

Join our email list 

bottom of page