How many grams of sodium are needed to react
Sodium reacts with hydrogen gas. How many grams of sodium are needed to react with 2.50 L of hydrogen measured at STP? What is the balanced chemical equation for this reaction?
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If solubility of a particular solute is 10g/100g H2O at 20 degrees C, which of the following solution concentrations would represent a supersaturated aqueous solution of that solute?
Twenty grams of a solute are added to 100g of water at 25C. the vapor pressure of pure water is 23.76 mmHg, the vapor pressure of the solution is 22.41 torr. Calculate the molar mass of the solute.
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Boron has two naturally occurring isotopes, 10B (19.9%) and 11B (80.1%). Although the B2 molecule does not exist naturally on Earth, it has been produced in the laboratory and been observed in stars. How many different B2 molecules are possible? W
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Fun activities that expose you to real-world chemistry and biology. Exposure to real-life research and career opportunities in academia and industry. Student-selected topics Do free radicals in food cause cancer?
Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of gas is 8.70 l at 895 torr and 25 Celsius. How many grams of Cl2 are in the sample? what volume will the
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