SCIENCE
CHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Calculate the molecular mass of
|
|
17
|
|
|
18
|
|
|
14
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen’s is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.
Detailed explanation-2: -The molecular weight of hydrogen peroxide is 34 .
Detailed explanation-3: -Molecular formula of water is H2O. Atomic mass of H=1 u and atomic mass of O=16 u. Thus, molecular mass of H2O=2×1+16=18 u.
Detailed explanation-4: -Hydrogen has an atomic mass of 1 and oxygen atomic mass of 16, so H2O has a mass of 16+2×1=18 g/mol.
Detailed explanation-5: -Molar mass of H2O=2×1+16=18g/mol.
There is 1 question to complete.