Acetylene gas is 92.3% carbon and 7.7% hydrogen (by mass), and its molar mass is 26 g/mol. What is its molecular formula?
a. C4H4
b. CH
c. CH2
d. CH4
e. none of these

How will the emission of an alpha particle affect the atomic number of an atom

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.

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius