Vì sao nguyên tử khối trung bình của Oxi khi tính ra thì lớn hơn 16u mà thực tế là 15,999

What is the number of moles in 15.0 g ash3?

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.

Which of the following is a chemical property of water at 4 c