Hi, sry again -_- but i have yet another question.. what am i doing wrong!?
im trying to convert Atoms to Grams. EXample
so im doing
96655)=3.3g (putting it to 2 sig figs.)
same thing for 2.80×1022
im doing (2.80×1022 )(1/6.022x10^23)(4.002602)=1.9
last but not least can you guys help me get an idea of how to do this problem i think i know how but want to verify.
How many helium atoms are there in a helium blimp containing 535 of helium?
so i would start off by puting 535 into grams (535000g)then divide by molar mass then multiply by avogadro = atoms (8.0*10^28)
1) I see what you did for the 1st problem, but i cant seem to use that method when doing
7.4×1021 or 2.80×1022
2) Also is the answer going to be 8 atoms or the 8.049x10^24?? (because i would have to round this to 4 sig figs since the 6.022 is 4 sig figs and since im dividing with if that makes sense?