HgO decomposes when exposed to heat: 2HgO => 2Hg + O2 \DeltaΔH = +181.6 What mass of O2 can be made with 100.0 kJ? Use 16 g/mol = O You

Question

HgO decomposes when exposed to heat: 2HgO —> 2Hg + O2 \DeltaΔH = +181.6 What mass of O2 can be made with 100.0 kJ? Use 16 g/mol = O Your answer should be written with 3 significant figures.

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Nguyệt Ánh 1 year 2021-08-31T01:06:56+00:00 1 Answers 27 views 0

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    2021-08-31T01:08:19+00:00

    Answer:

    17.6 g

    Explanation:

    Step 1: Write the balanced thermochemical equation for the decomposition of HgO

    2 HgO ⇒ 2 Hg + O₂   ΔH = +181.6 kJ

    Step 2: Calculate the moles of O₂ produced from 100.0 kJ

    According to the balanced equation, 1 mole of O₂ is produced when 181.6 kJ are absorbed.

    100.0 kJ × 1 mol O₂/181.6 kJ = 0.5507 mol O₂

    Step 3: Calculate the mass corresponding to 0.5507 moles of O₂

    The molar mass of O₂ is 32 g/mol.

    0.5507 mol × 32 g/mol = 17.6 g

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )