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No. of moles of O2 gas in 32g of O2 = 32/32 = 1
So, no. of molecules = no. of moles × 6.023 × 10^23
Therefore, no of molecules = 6.023 × 10^23 × 1 = 6.023 × 10^23
1 oxygen molecules has 2 atoms
So, no of oxygen atoms = 2 × 6.023 × 10^23 = 12.046 × 10^23
So, no. of molecules = no. of moles × 6.023 × 10^23
Therefore, no of molecules = 6.023 × 10^23 × 1 = 6.023 × 10^23
1 oxygen molecules has 2 atoms
So, no of oxygen atoms = 2 × 6.023 × 10^23 = 12.046 × 10^23
Sriyathmika:
hello i am sorry ur answer was wrong please think and say...
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hey..... atomic mass of oxygen is 32u
So , 32 gram of oxygen contains = 6 *10^23 molecules of oxygen.
then 1 gram of oxygen contains = 6*10^23/32 gram molecules.
hence, 3.2gram oxygen contains = 6*10^23/32 *3.2 = 6*10^22 molecules.
hence, 4) is the right answer.
please mark me as brainliest.
So , 32 gram of oxygen contains = 6 *10^23 molecules of oxygen.
then 1 gram of oxygen contains = 6*10^23/32 gram molecules.
hence, 3.2gram oxygen contains = 6*10^23/32 *3.2 = 6*10^22 molecules.
hence, 4) is the right answer.
please mark me as brainliest.
ya
no
no
ok don't worry
Look , atomic mass of any element or compound have constant number of atoms or molecules. ..i.e, 6*10^23 which is known as avogadro number
example.. atomic mass of oxygen id 32u. so 32 g of oxygen contain 6*10^22 molecules
similarly , atomic mass of carbon is 12u , so 12g of carbon have 6*10^22 atom.
atomic no. of hydrogen is 1u...so if we take 1g of hydrogen then it has the same no. of atoms that is 6*10^22
Oops sorry it is 23 instead of 22 in above.
So thats it..hope i clearify u.....thanks
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