Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
?
? asked in Science & MathematicsChemistry · 4 years ago

Chem help!!!?

1. Which pair of symbols below represents a pair of isotopes?

16O, 16N

16O, 17O

H, He

He, He+

13C, 14N

2. Perform the indicated operations and express the answer to the proper number of significant figures. 13.236 cm x 6.2 cm/5.28 cm =

2 Answers

Relevance
  • Harini
    4 years ago
    Favorite Answer

    1)

    16O and 17O

    Mass number is different. Isotopes

    2) 15.54 but significant figures must be only two. Therefore 1.5×10^1

  • angelakanelina
    4 years ago

    He+

Still have questions? Get your answers by asking now.