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  1. A 676 mL gas sample at STP is compressed to a volume of 157 mL, and the temperature ...

    1 Answers · Science & Mathematics · 28/11/2020

  2. Mg + 2HCl ---> MgCl2 + H2 ------------- Mg to H2 molar ratio is 1 to 1, so moles of H2 produced equals moles of Mg consumed. 0.0572 g / 24.305 g/mol = 0.00235 mol The answer is...

    2 Answers · Science & Mathematics · 24/11/2020

  3. ...@ / 1 mol C3H8)*3.9 moles propane = 11.7 mol At STP , 1 mole any gas will occupy 22.4 L volume of CO2, at STP , will...

    2 Answers · Science & Mathematics · 21/11/2020

  4. CaC2 + 2 H2O → C2H2 + Ca(OH)2 2 C2H2 + 5 O2 → 4 CO2 + 2 H2O If there is 15% impurities, then the fraction of pure CaC2 is 85%.  Supposing these percentages to be by mass...

    1 Answers · Science & Mathematics · 22/11/2020

  5. At STP , 1 mol of gas occupies 22.4 L. So, 4 L X (1...

    1 Answers · Science & Mathematics · 18/11/2020

  6. a) n = PV / RT = (795 mmHg) x (155 L) / ((62.36367 L mmHg/K mol) x (435 + 273) K) = 2.7908 mol H2 (2.7908 mol H2) x (2 mol TiCl4 / 1 mol H2) x (189.679 g TiCl4/mol) = 1060 g TiCl4 b) (2.7908 mol H2) x (2...

    1 Answers · Science & Mathematics · 16/11/2020

  7. Convert the % of each element to grams For example, a molecule has a molecular weight of 180.18 g/mol. It is found to contain 40.00% carbon, 6.72% hydrogen and 53.28% oxygen. Convert the percentages to grams. 40.00 grams of carbon...

    1 Answers · Science & Mathematics · 11/11/2020

  8. ... 70.9 g/mol = 29.7 g Cl2 To calculate the volume of gas at STP , you can either calculate it using:P1V1/T1 = P2V2/...

    1 Answers · Science & Mathematics · 27/10/2020

  9. Assuming STP ===  1.7 x 10^24

    2 Answers · Science & Mathematics · 18/10/2020

  10. The molar volume is the same for all gases.  So the density depends only on the molar mass. Answer D) shows the gases in order of increasing molar mass, so they are also in order of increasing density.

    1 Answers · Science & Mathematics · 18/10/2020

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