Sorry, just asking a question on chemistry.
No question posted.
How can i figure out how many pieces of rice are in a beaker full of rice?!
Rossy, if you want to ask a new question, you should go to the top of the page, click on Post a New Question, type in your question, etc etc. Sometimes these piggy back questions don't get answered. Howver, this is what I would do.
You have two ways to do it.
Method #1.
Count the grains manually. Takes a lot of time (depending upon the size of the grains and the size of the beaker) BUT you will have an accurate count if you don't get bleary eyed in the process.
Method #2.
1. Weigh the beaker of rice. You want the weight of the rice ONLY so you may need to subtract the weight of the beaker OR tare the beaker at the beginning.
2. Pour out the rice, then add some number of rice grains to the beaker that has been tared. I would suggest you add a relatively large number; that is, not 10 or 15 but more like 500 or so. There is a method to this madness--the larger the number you count out to weigh in this step, the more accurate will be the final count in step 4.
3. Weigh the grains you have counted.
4. Calculate the average mass of 1 grain, then calculate how many grains must have been in the original mass of rice you weighed in step 1.
Note: If this is a chemistry or physics problem, note that we CAN'T count a mole of atoms (6.02 x 10^23 atoms is a HUGE number) BUT we can weigh a mole of atoms. We count atoms in chemistry by weighing them.