1.5 into 10^22 atoms of an element weight 0.9 grams atomic mass of the element in AMU is a 36,b 18,c 54,d72
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Answered by
62
The Avogadro's number = 6.022x10^23
1 mole of an element has 6.022x10^23 atoms
Number of moles in 1.5x10^22 atoms = (1.5x10^22)/(6.022x10^23)
= 2.5 x 10^-2
= 0.025 moles
Atomic mass = Given mass/Number of moles
= 0.9/0.025
= 36
Choice (a)
1 mole of an element has 6.022x10^23 atoms
Number of moles in 1.5x10^22 atoms = (1.5x10^22)/(6.022x10^23)
= 2.5 x 10^-2
= 0.025 moles
Atomic mass = Given mass/Number of moles
= 0.9/0.025
= 36
Choice (a)
Answered by
14
Answer:
Step-by-step explanation:
The Avogadro's number = 6.022x10^23
1 mole of an element has 6.022x10^23 atoms
Number of moles in 1.5x10^22 atoms = (1.5x10^22)/(6.022x10^23)
= 2.5 x 10^-2
= 0.025 moles
Atomic mass = Given mass/Number of moles
= 0.9/0.025
= 36
Choice (a)
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