Which of the following has the largest number of atoms?(I NEED THE STEPS OF CALCULATION)
*0.5g atom of Cu
*10^23 atoms of Cu
*0.623 g atom of Cu
*3.175 gram of Cu.
Please i need the steps!!!!
Answers
Answered by
61
★ 0.5g atom of cu
means mole of cu = 0.5
no of atoms = mole × Avogadro's constant =0.5 × 6.023 × 10^23 = 3.0115×10^23
★ 10^23 atoms of cu
★ 0.623 g atoms cu
so, no of mole = 0.623
no of atoms = mole × Avogadro's constant =0.623× 6.023×10^23
= 3.752 × 10^23
★3.175 g of cu
mole = given wt/atomic wt
=3.175/63.5 = 1/50 = 0.02
no of atoms = 0.02 × 6.023× 10^23
= 0.12046 × 10^23
here you can see that no of atoms largest in 0.623 g atom of cu .
means mole of cu = 0.5
no of atoms = mole × Avogadro's constant =0.5 × 6.023 × 10^23 = 3.0115×10^23
★ 10^23 atoms of cu
★ 0.623 g atoms cu
so, no of mole = 0.623
no of atoms = mole × Avogadro's constant =0.623× 6.023×10^23
= 3.752 × 10^23
★3.175 g of cu
mole = given wt/atomic wt
=3.175/63.5 = 1/50 = 0.02
no of atoms = 0.02 × 6.023× 10^23
= 0.12046 × 10^23
here you can see that no of atoms largest in 0.623 g atom of cu .
PrincessManshi:
but the right ans is 0.5
this is perfect answer if you not satisfied i wil send this in science teacher
perfect answer.
thanks mam
but see ask my this is not answer
Its correct.
thanks for checking mam ,
thank u so much abhi..and sorry for judging u wrong...
Answered by
17
The correct answer is 0.623 g atom has more atom of cu
Attachments:
number of atoms = g atom × Avogadro number
basically g atom is mole
so u know that number of atom = mole × Avogadro's number
thank u both ..... u guyz were really helpful to me !!and sorry I had the option of making bainliest of any one! otherwise u both are brainliest!!!!
tq...but abhi said coreect than me...u should mark him as brainlist
but the question consist of only atom not 'g atom"
yeph!! but i was so tensed that i just confused to whom should i give the BRAINLIEST.. I m so sorry abhi...
in 1st option 0.5g atom means 0.5 mole and in 2nd option no . of atom is given..in 3rd option 0.623 g atom is given means 0.623 mole and in 4th option 3.175 gram of cu given it means weight of copper is given 3.175 gram so we Have to fine mole
soo in 4th option i find mole = weight of cu / atomic weight
OKAY.. i got it..
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