Air is made up of mostly O2, N2 and CO2. if the total pressure of the air is 765 mmhg and P(n2)= 600 mmHg and P(CO2)=38 mmHg then what is the partial pressure of the O2 ?

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent

Rank substituents in order of their priority when assigning the e or z label to an alkene. i, ch2i , h, ch2ch2cl, f

How many atoms or molecules are there in a mole of a substance?