Rank the following samples according to increasing mass of oxygen from lowest to highest.
1. 35.0 g CO2
2. 10.0 g SO2
3. 20.0 g Fe(NO3)2
4. 18.0 g CH3OH
2007-03-08 11:39:35 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Calculate the molecular mass of each substance and the percent composition of oxygen in that molecular mass. The multiply each percentage of oxygen by the grams of each sample.
You will now have the ranking order you need
2007-03-08 11:48:48 · answer #1 · answered by reb1240 7 · 0⤊ 0⤋
It may help if you first change them all into the same amount of grams (140 grams) using multiplication, and then see how many Oxygens there are in each one
1.35.0 g CO2 x 4 = 140 grams 4CO2 = 8 oxygens
you can figure it out from there
2007-03-08 11:49:21 · answer #2 · answered by alisha_4080 2 · 0⤊ 0⤋