This is a problem on my chemistry worksheet.
Need to convert from grams to atoms or molecules of H2O.
How to solve??
Thanks
Need to convert from grams to atoms or molecules of H2O.
How to solve??
Thanks
-
48.5g x (1mol / 18g) x (6.02 x 10^23 atoms / mol) = 1.62 x 10^24 atoms
There are 48.5 grams of H2O. 18 grams make up 1 mole of H2O, so 48.5 grams makes up 2.69 moles of H2O. 1 mole of anything has 6.02 x 10^23 atoms (Avogadro's number), so 2.69 moles of H2O has 1.62 x 10^24 atoms.
My method of solving this question is called "dimensional analysis" or sometimes the "factor-label method." This method is commonly used in chemistry, so you should learn the concept and then practice it a lot until you are good at it because it is a very useful skill in science and math classes.
There are 48.5 grams of H2O. 18 grams make up 1 mole of H2O, so 48.5 grams makes up 2.69 moles of H2O. 1 mole of anything has 6.02 x 10^23 atoms (Avogadro's number), so 2.69 moles of H2O has 1.62 x 10^24 atoms.
My method of solving this question is called "dimensional analysis" or sometimes the "factor-label method." This method is commonly used in chemistry, so you should learn the concept and then practice it a lot until you are good at it because it is a very useful skill in science and math classes.