Q. What is the weight of 10 moles of a mixture with composition 15% O₂, 25% SO₂, 30% COCl₂ , 25% SO₃ and 5% N₂?

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Q. If a compound contains 48% of Carbon, 48% of oxygen and 8% of hydrogen by weight, then what is the possible molecular formula of the compound?

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Q. A compound contain 12% of carbon, 16% of oxygen, 28% of nitrogen, 4% of hydrogen and 40% calcium by weight, then what can be the possible formula of the compound?

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Q. What is the value of x in C₂H₈(OH)x if the percentage by weight of hydrogen is 12%?

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Q. If hydrogen is 14% by weight in CH₃(OH)x(NH₃)y, then what is the possible value of x*y?

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Q. A liquid mixture of O₂, CH₄ and CO has the composition 32% O₂, 16% CH₄ and 52% CO, then what is the mole fraction of CH₄?

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Q. A gaseous mixture is composed of 20% CO₂, 40% O₂ and 40% N₂. What is the mass fraction of N₂?

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Q. A liquid mixture composed of 20% CH₄, 30% C₂H₄, 35% C₂H₂, and 15% C₂H₂O. What is the average molecular weight of the mixture?

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Q. A gaseous mixture composed of 20% CH₄, 30% C₂H₄, 35% C₂H₂, and 15% C₂H₂O. What is the average molecular weight of the mixture?

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Q. The mole percent of H₂ and N₂ in a mixture is 50% each, what is the mass percentage of H₂?

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Q. The mole percent of CO₂ and H₂O in a mixture is 40% and 60% respectively, what is the mass percent of CO₂?

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Q. A mixture contains 20% CO₂, 30% SO₂ and 50% H₂O, what is the mass percent of CO₂?

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Q. A mixture contains 20% NaCl, 30% CH₄ and 50% H₂O, what is the mass percent of NaCl?

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Q. A mixture contains 10% CO, 40% CO₂ and 50% H₂O, what is the mass percent of CO₂?

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Q. Which of the following is not the unit of concentration?

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Q. What is the concentration of a 22 grams of carbon dioxide occupying 0.5 m³ volume?

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Q. What is the concentration of 100 lbs. of solution occupying 25 m³ of volume?

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Q. What is the molarity of a solution with mass of solute 10 kg mass and 100 liter volume?

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Q. What is the concentration of a solution with 10 grams of calcium in 1000 m³ of water?

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Q. How much Sodium is there in a solution with 10 Kg of solvent (Density = 5 Kg/m³) and concentration 4 molar?

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