What will be the mass of 2.05*10^16 molecules of h2so4
Answers
Answer:
0.00000334
Explanation:
amount of moles=mass/molecular weight
for this problem, you need the avogadro number. it's a constant. the avogadro number tells you how many particles there are in a mole. that's why a mole is called the chemists dozen. 1 mole = 6.02 x 10^23, which is the avogadro number.
therefore you need to convert 2.05 * 10^16 to moles.
2.05*10^16 x 1 / 6.02 * 10^23 = 0.00000003 moles
n=m/mw
the molecular weight of h2so4 is= 2h+s+4o= (2 + 32 + 64) =98. this is rounded up, so just take 98.07 for a more accurate result.
hence:
0.00000003 moles=m/98.07 so m= 0.00000003 x 98.07
m=0.00000334 grams.
Answer:
3.337×10^_6
Explanation:
we can find the answer by making standards;
1 mole h2so4 molecule=98g=6.02×10^23 molecules of h2so4
x=2.05×10^23
(now we can cross multiply)
98g×2.02×10^23/6.02×10^24
=33.37×10^_7
=3.337×10^_6