The half-life of Element T is 1 week. How much of a 100g sample is left after 90 days

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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.

How many moles are contained in 5.6 l of h2 at stp