Chemistry lab help
Hey guys, I need some help on how to set up the calculations for this lab.
"Calculate the number of moles in each individual element in the spoonful of water. (Hint: start with the answers from Part III; you will have 2 answers for water)
data from da lab: molar mass of water is 18.0 g, there are 0.2960 moles of water
any help is appreciated
EDIT: I figured it out but now I have a similar question:
how do i calculate the number of atoms of each element in the spoonful of water? I have to use the answer from the above^^^
October 19, 2012
6 Comments • Newest first
Don't do chemistry, God created the Earth 6000 years ago and dinosaurs are just a way to test our faith.
Yes, so oxygen would be .296 times avogadro's number and hydrogen would be .592 times avogadro's number. That gives you the number of atoms for each element.
[quote=flamedagger]H2O. 2 Hydrogens to 1 oxygen. Look at stoichiometric ratios
0.296 moles of H2O
0.296 moles O
(2 x .296) moles of H
Edit: To calculate number of atoms, multiply number of moles by Avogadro's number, 6.02 x 10^23[/quote]
Do I take the number of moles I got for each element and multiply by avogadro's number?
H2O. 2 Hydrogens to 1 oxygen. Look at stoichiometric ratios
0.296 moles of H2O
0.296 moles O
(2 x .296) moles of H
Edit: To calculate number of atoms, multiply number of moles by Avogadro's number, 6.02 x 10^23
H:O ratio in water is 2:1
meaning that the number of moles of each element in water is at a 2:1 ratio.
If there're .2960 moles of water then you have .2960 moles of O and .5920 moles of H
i love chemistry
.296 moles of water * ( 1 mole O/1 mole H2O)
.296 * (2mole H/1mole H2O)
i think i did this write idk i forgot my basic chem