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1. ### When a 0.0572g strip of Mg is reacted with excess HCl, 52.0 mL of gas is collected over water in a eudiometer...?

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

2. ### How many liters of CO2 are formed at STP by the complete combustion 19.0 L of the propane at a pressure of 5.0 atm and 27 ∘C?

...@ / 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

3. ### Chemistry question about CaC2?

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

4. ### Chemistry yield?

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

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

5. ### Given the following reaction: 2 TiCl4 (g)  +  H2 (g) → 2 TiCl3 (s)  +  2 HCl (g)?

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

6. ### Chemistry Question?

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

7. ### how much lighter is a vacuum than hydrogen?

Hydrogen gas at STP has a density 0f 0.08988 g/L = 5.611 lbs / 1000 cubic feet...

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