mass of 25 He atoms is equal to how many unified mass(u) ??
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ANSWER: 100amu
EXPLANATION:
since we know that
1 molecule of h2o=18amu
so 25 molecules of he=100amu(molecular mass of he=4)
Also no of atoms and molecules of noble gases are equal.
EXPLANATION:
since we know that
1 molecule of h2o=18amu
so 25 molecules of he=100amu(molecular mass of he=4)
Also no of atoms and molecules of noble gases are equal.
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