What is the molarity of a solution which contains 0.80 mol of HCl in 250mL of
solution?

Iknow the answer is a but i don't know why

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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.