The Atomic Weight Of Hydrogen Is 1.0079 Amu And The Atomic Weight Of Oxygen Is 15.999 Amu. Using The Information, What Is The Molecular Weight Of A Mo

The atomic weight of hydrogen is 1.0079 Amu and the atomic weight of oxygen is 15.999 amu. Using the information, what is the molecular weight of a molecule of water, H2O? (Amu= atomic mass unit)

HELP PLEASE

Good Day....

Problem:

What is the molecular weight of a molecule of water, H2O? (Amu= atomic mass unit)

Given Data:

Oxygen = 15.999 atomic mass unit (amu)

Hydrogen = 1.0079 atomic mass unit (amu)

Note: H2O contains 2 atoms of hydrogen and 1 atom of Oxygen

Hydrogen = 1.0079  amu × 2 = 2.0158 amu (H2)

Oxygen =  15.999  amu × 1 = 15.999  amu    (O)

Solution:

Add the atomic mass unit of 2 hydrogen to the atomic mass unit of 1 oxygen.

H2O =  2.0158 amu + 15.999  amu = 18.0148 amu

We can also say that 1 mole of H2O is equal to 18.0148 grams.

Molar mass of H2O = 18.0148 grams/mol

Answer:

H2O has 18.0148 atomic mass unit (amu)

H2O has a molar mass of 18.0148 grams / mol

Hope it helps...=)


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