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Some Basic Concepts In Chemistry Questions
15 Practice QuestionsStart Practicing Now
- [Easy]According to the law of multiple proportions, when two elements A and B combine to form more than one compound, the masses of B that combine with a fi...
- [Easy]How many molecules are present in 5.6 g of nitrogen gas (N₂)?...
- [Easy]What is the mass of 1.5 moles of calcium carbonate (CaCO₃)?...
- [Medium]What is the result of (2.5 × 3.42) / 1.2 when expressed with correct significant figures?...
- [Easy]The molality of a solution prepared by dissolving 18 g of glucose (C₆H₁₂O₆) in 100 g of water is:...
- [Easy]Which of the following represents the dimensions of molar mass?...
- [Medium]The number of moles of oxygen atoms in 8.8 g of CO₂ is:...
- [Medium]When 10.6 g of Na₂CO₃ reacts completely with excess HCl, what volume of CO₂ gas is produced at STP?...
- [Medium]What mass of oxygen is required for complete combustion of 2.2 g of propane (C₃H₈)?...
- [Easy]The number of significant figures in 0.00340 is:...
- [Medium]A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. Its empirical formula is:...
- [Easy]What is the molarity of a solution containing 9.8 g of H₂SO₄ in 500 mL of solution?...
- [Easy]What is the percentage of nitrogen by mass in ammonium nitrate (NH₄NO₃)?...
- [Medium]10 g of hydrogen reacts with 80 g of oxygen. What is the mass of water formed?...
- [Easy]Nitrogen and hydrogen react to form ammonia. If 28 g N₂ and 6 g H₂ are mixed, which is the limiting reagent?...