Class 9 Exam > Class 9 Questions > The mass of 0.5 moles of Water molecules is:(...
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The mass of 0.5 moles of Water molecules is:(Atomic mass, H =1; O = 16)
- a)27 g
- b)0.5 g
- c)9 g
- d)18 g
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The mass of 0.5 moles of Water molecules is:(Atomic mass, H =1; O = 16...
For 1 mole of water =molecular mass of water (H2O)in grams
=mass of 2H atoms +mass of O atoms
=2x1+16
=mass of 2H atoms +mass of O atoms
=2x1+16
=2+16
=18 grams ⇒ for 1 mole
For 0.5 moles = 18x0.5
= 9.0 grams
Most Upvoted Answer
The mass of 0.5 moles of Water molecules is:(Atomic mass, H =1; O = 16...
Given mass / molecular mass = no.of moles
given mass/ 18=0.5
given mass=0.5*18
given mass=9g
given mass/ 18=0.5
given mass=0.5*18
given mass=9g
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Community Answer
The mass of 0.5 moles of Water molecules is:(Atomic mass, H =1; O = 16...
Given Data:
Mass of Water = ?
no. of moles = 0.5
Molar mass of H₂O = 2(1) + 16 = 18 g/mol
Mass of Water = ?
no. of moles = 0.5
Molar mass of H₂O = 2(1) + 16 = 18 g/mol
Formula to be Used:
No. of moles = Given Mass/Molar mass
No. of moles = Given Mass/Molar mass
Solution:
No. of moles = Mass of Water/Molar mass
0.5 = Mass of Water/18
Mass of Water = 0.5*18
Mass of Water = 9g
No. of moles = Mass of Water/Molar mass
0.5 = Mass of Water/18
Mass of Water = 0.5*18
Mass of Water = 9g
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The mass of 0.5 moles of Water molecules is:(Atomic mass, H =1; O = 16)a)27 gb)0.5 gc)9 gd)18 gCorrect answer is option 'C'. Can you explain this answer?
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