Composition

Chemistry Level 1

What is the percentage of oxygen in sulfuric acid?

Periodic Table

16.314% 57.143% 65.254% Cannot be determined

Ethan Mandelez by Ethan Mandelez , 15, Malaysia

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3 solutions

Hongqi Wang
Dec 25, 2020

P O = 4 O 2 H + S + 4 O = 4 × 16 2 × 1 + 32 + 4 × 16 ≈ 65.3 % \begin{aligned} P_O &=\dfrac {4O}{2H + S + 4O} \\ &= \dfrac {4 \times 16}{2 \times 1 + 32 + 4 \times 16} \\ &\approx 65.3\% \end{aligned}

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Dwaipayan Shikari
Dec 24, 2020

Approximate molar mass of H = 1 \mathrm{H =1 } For S = 32 \mathrm{S=32} , and O = 16 \mathrm{O=16}

Molecular weight of H 2 S O 4 = 2 + 32 + 16 × 4 = 98 g m o l \mathrm{H_2SO_4 = 2+32+16×4=98 gmol} Presence of O 2 ( percentage ) = 64 98 × 100 % = 65.3 % \mathrm{O_2(\textrm{percentage}) = \frac{64}{98}×100\%= 65.3\%} Merry Christmas 🎅 🤶 🦌 \color{#E81990}\textrm{Merry Christmas}🎅🤶🦌

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Ethan Mandelez
Dec 24, 2020

Stoichiometry & Percentage Composition

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Just curious, is it possible to answer correctly without knowing the mass of 1 mol of S? (Assumptions : this person had no way to access a PT, but still remembers that H = 1 and O = 16, and realizes that S is one of the first twenty in the table). I saw you provided the access above, so it's just a hypothetical question being asked here, okay?

Saya Suka - 5 months, 2 weeks ago

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