(a)
Interpretation:
The reaction that produces most
Concept introduction:
Hydrogen is a minor component of atmosphere and very less in Earth’s crust also. It is one of the most important substances in
(b)
Interpretation:
The solid that produces most
Concept introduction:
Hydrogen is a minor component of atmosphere and very less in Earth’s crust also. It is one of the most important substances in Inorganic chemistry as it is used as the precursor of many compounds. Hydrogen gas is very good reducing agent as it is used in the reduction of different metal oxide to their respective metals by heating at high temperature. It is one of the components of water gas also. Hydrogen gas is mainly produced by the reaction of metal and metal hydrides with water.
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General Chemistry: Principles and Modern Applications (11th Edition)
- A solution is prepared by diluting 0.7850 L of 1.262 M potassium sulfide solution with water to a final volume of 2.000 L. (a) How many grams of potassium sulfide were dissolved to give the original solution? (b) What are the molarities of the potassium sulfide, potassium ions, and sulfide ions in the diluted solution?arrow_forwardThe mercury content of a stream was believed to be above the minimum considered safe —1 part per billion (ppb) by weight. An analysis indicated that the concentration was 0.68 parts per billion. What quantity of mercury in grams was present in 15.0 L of the water, the density of which is 0.998 g/ml? ( 1ppbHg=1ngHg1gwater)arrow_forwardLauryl alcohol is obtained from the coconut and is an ingredient in many hair shampoos. Its empirical formula is C12H26O. A solution of 5.00 g of lauryl alcohol in 100.0 g of benzene boils at 80.78C. Using Table 10.2, find the molecular formula of lauryl alcohol.arrow_forward
- When water is added to a mixture of aluminum metal and sodium hydroxide, hydrogen gas is produced. This is the reaction used in commercial drain cleaners: 2Al(s)+6H2O(l)+2OH(aq)2Al(OH)4(aq)+3H2(g)A sufficient amount of water is added to 49.92 g of NaOH to make 0.600 L of solution; 41.28 g of Al is added to this solution and hydrogen gas is formed. (a) Calculate the molarity of the initial NaOH solution. (b) How many moles of hydrogen were formed? (c) The hydrogen was collected over water at 25C and 758.6 mm Hg. The vapor pressure of water at this temperature is 23.8 mm Hg. What volume of hydrogen was generated?arrow_forwardIf an electric current is passed through molten sodium chloride, elemental chlorine gas is generated as the sodium chloride is decomposed. :math>2NaCl(1)2Na(s)+Cl2(g) at volume of chlorine gas measured at 767 mm Hg at 25 °C would be generated by complete decomposition of 1.25 g of NaCl?arrow_forwardWhat mass of a 4.00% NaOH solution by mass contains 15.0 g of NaOH?arrow_forward
- How would you prepare from the solid and pure water (a) 0.400 L of 0.155 M Sr(OH)2? (b) 1.75 L of 0.333 M (NH4)2CO3?arrow_forwardSolutions of hydrogen in palladium may be formed by exposing Pd metal to H2 gas. The concentration of hydrogen in the palladium depends on the pressure of H2 gas applied, but in a more complex fashion than can be described by Henry's law. Under certain conditions, 0.94 g of hydrogen gas is dissolved in 215 g of palladium metal (solution density = 10.8 g cm3). (a) Determine the molarity of this solution. (b) Determine the molality of this solution. (c) Determine the percent by mass of hydrogen atoms in this solution.arrow_forwardDissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter (Figure 5.12) at 22.4 °C causes the temperature to rise to 25.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g °C? Is the reaction exothermic or endothermic?arrow_forward
- Nitric acid can be prepared by bubbling dinitrogen pentoxide into water. N2O5(g)+H2O2H+(aq)+2NO3(aq)(a) How many moles of H+ are obtained when 1.50 L of N2O5 at 25C and 1.00 atm pressure is bubbled into water? (b) The solution obtained in (a) after reaction is complete has a volume of 437 mL. What is the molarity of the nitric acid obtained?arrow_forward38. A public water supply was found to contain 1 part per billion (ppb) by mass chloroform, CHCl3. How many CHCl3 molecules would be present in 12 fl oz of this water?arrow_forward
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