The purity of a sample containing zinc and weighing 0.312 g is determined by measuring the amount of hydrogen formed when the sample reacts with an excess of hydrochloric acid. The determination shows the sample to be 84.0% zinc. What amount of hydrogen (measured at STP) was obtained?

Q: Calculate the g aluminum required to generate 913 mL of hydrogen gas at STP.

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Q: What volume of CO2 gas at 645 torr and 800. K could be produced by the decomposition of 45.0 g of…

A: Number of moles of Calcium carbonate and carbondioxide can be calculated as follows:

Q: Enter your answer in the provided box. A piece of sodium metal reacts completely with water as…

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Q: In the reaction of sodium phosphate with aluminum nitrate, 65 ml of 0.125 mol/L sodium phosphate is…

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Q: What volume, in milliliters, will 6.1 g  of CO2 occupy at STP ?

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Q: Determine the volume of O 2 (at STP) formed when 70.0 g of Fe2O3 decomposes according to the…

A:

Q: What is the volume in liters of hydrogen gas that would be produced by the reaction of 52.6 g of Al…

A: Equation: 2 Al (s) + 6 HCl (aq) →2 AlCl3 (aq) + 3H2 (g)   Given, Mass of Al = 52.6 g Molar mass of…

Q: How many liters of CO2 are produced when 3.46 Fe2O3 is converted to cast Fe at STP?

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Q: What mass of Al(s) is required to produce 727.5 mL of H, (g) at STP?

A: Since you have posted multiple questions, we are entitled to answer the first only. Please repost…

Q: volume

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Q: Calculate the volume, in liters, occupied by 1.92 mol of neon gas at STP. O 43.0 L 22.4 L 20.2 L O…

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Q: You are heating potassium perchlorate and collecting the oxygen gas from the decomposition over…

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Q: Which one is safer , filling the balloon with air or with carbon dioxide ?why?

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Q: 1. The surface atoms of aluminum metal corrode in air to form an impervious aluminum oxide coating…

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Q: Consider the reaction between aluminum and sulfuric acid to produce aluminum sulfate and hydrogen.…

A: One mole of any gas at STP(standard temperature and pressure i.e 273 K and 1 atm ) take up a volume…

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Q: How many liters of hydrogen gas at STP are required to produce 13.8 grams of ammonia (NH3)? 3 H2 +…

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Q: How much energy (in kJ) is absorbed when 106. L of nitrogen dioxide is created at STP?

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Q: How many liters of hydrogen gas at STP were generated from 52.70 g of zinc metal?

A: Generation of hydrogen gas from 52.0 g of Zn metal.

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Q: Why gas masks are used by miners in coal mines while working?

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A: how many liters of carbon dixide measured at STP  would be produced from the decomposition of 325 g…

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A:

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Group 15 elements

The elements of group 15 are phosphorus, nitrogen, bismuth antimony, and arsenic. The most abundant element which is present in the air is nitrogen and the percentage of nitrogen present in the air is 78%. In the free state, the elemental nitrogen is present as diatomic gas (N2). In the organic matter obtained from plants and animals, phosphorus is the dominant element present. In nucleic acids, phosphate groups are present. Phosphates are also found in teeth and bones. The other elements arsenic, bismuth, and antimony are found as sulfides. Arsenopyrite, bismuth glance, and stibnite are examples of sulfides of arsenic, bismuth, and antimony respectively.