You place a piece of paper on a balance and find that its mass is 0.63 g. You add a lump of NaOH to the paper and get a mass of 22.21 g. How Much NaOH do you have on the balance, in grams, milligrams, micrograms and kilograms?

Question

You place a piece of paper on a balance and find that its mass is 0.63 g. You add a lump of NaOH to the paper and get a mass of 22.21 g.  How Much NaOH do you have on the balance, in grams, milligrams, micrograms and kilograms?

oobleck · Answer

22.21g - 0.63g = 21.58g now do the other units

ashley · Answer

so I just subtract? How do I actually slove the problem? what am i suppose to do?

DrBob222 · Answer

See my answer above to your repost. Oobleck did a great job. I have expanded on that answer above in which I've tried to draw a picture for you.