Please show me how to solve this problem. I don\'tunderstand very well. I will g

Question

Please show me how to solve this problem. I don'tunderstand very well.
I will give proper respect as soon as possible. PLEEEASE helpme!!! With what mass of oxygen would 2g of hydrogen combine to formwater(H2O)? [Hint: All you need to know is the ratio of the masses of theatoms concerned; you can find these masses, listed in atomic massunit, inside the back cover.] Atomic mass unit: 1u = 1/12m(12C atom) Book answer is 16g ( or more exactly, 15.84) Please show me how to solve this problem. I don'tunderstand very well.
I will give proper respect as soon as possible. PLEEEASE helpme!!! With what mass of oxygen would 2g of hydrogen combine to formwater(H2O)? [Hint: All you need to know is the ratio of the masses of theatoms concerned; you can find these masses, listed in atomic massunit, inside the back cover.] Atomic mass unit: 1u = 1/12m(12C atom) Book answer is 16g ( or more exactly, 15.84)

Explanation / Answer

The molecular mass (abbreviated M) of a substance, frequentlyreferred to by the older term molecular weight and abbreviated asMW, is the mass of one molecule of that substance, relative to theunified atomic mass unit u (equal to 1/12 the mass of one isotopeof carbon-12). we know that molar mass = average molecular mass * ((1/6.0220) *10-23 g/u) * (6.022 * 1023 /mol) or molar mass in g/mol = averge molecular mass in u The average atomic mass of natural hydrogen is 1.00794 uand that of natural oxygen is 15.9994 u; therefore, themolecular mass of natural water with formula H2O is (2× 1.00794 u) + 15.9994 u = 18.01528 u.Therefore, one mole of water has a mass of 18.01528 grams.However, the exact mass of hydrogen-1 (the most common hydrogenisotope) is 1.00783, and the exact mass of oxygen-16 (the mostcommon oxygen isotope) is 15.9949, so the mass of the most commonmolecule of water is 18.01056 u.Therefore,the mass of oxygenthat 2 g of hydrogen combine to form water (H2O) is 16g.

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