A 22.0-gram sample of impure sodium chlorate was heated until decomposition was complete. The liberated oxygen occupied a volume of 3.20 L measured at 25 oC and 890. torr. What was the percent by mass of sodium chlorate in the original sample? 2NaClO3(s) -> 2NaCl(s) + 3O2(g)     22.3 %     44.5 %     54.8 %     49.4 %     92.0 %

Q: White phosphorus melts and then vaporizes at high tempera-ture. The gas effuses at a rate that is…

A: The Scottish physical chemist Thomas Graham gives direct relation between rate of effusion of gas…

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Q: A 2.50 g sample of solid potassium chlorate is decomposed according to the following reaction. If…

A:

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Q: Two samples of gas are separated in two rectangular 1.00 -L chambers by a thin metal wall. One…

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Q: In the reaction, 2KClO3(s)⟶2KCl(s)+3O2(g) what mass of potassium chlorate, KClO3, would be required…

A:

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A:

Q: A sample of nitrogen occupies a volume of 225 mL  at 45 oC  and 550 mmHg  of pressure. What will its…

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Q: The density of a sample of gas is 1.00 g/L at 745 mmHg and 109°C. What is the molar mass of the gas

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A: Here we are required to find the mass percentage of Al in the sample.

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A:

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

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Q: Calculate the number of grams of Mg that reacted to produce hydrogen gas with a volume of 17383 mL…

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Q: If He and Ne are allowed to effuse simultaneously, what will be the rate of effusion of He to Ne. O…

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Q: What volume of hydrogen at 27 °C and 723 torr may be prepared by the reaction of 8.88 g of gallium…

A: Given:

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Q: What is the density of sulfur dioxide gas at 795 torr and 25 oC?

A:

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

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Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

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Q: 1. If 4.000 grams of hydrogen peroxide is placed within a sealed 250 milliliter container at 500 K.…

A:

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Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A:

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.