Copper carbonate hydrate produces 1 mole of water (MM = 18.015 g/mol) for every mole of solid product (MM = 79.545 g/mol) produced. Given that 3.327 g of solid product were produced during the reaction, how many grams of water were released as water vapor? (number of moles= mass (g)/ molar mass (g/mol)).
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- Sulfur trioxide dissolves in water to make sulfuric acid, H2O4. Write a balanced chemical equation and determine the mass of sulfuric acid that can be produced from the reaction of 18.0ml of water (d = 1.00g/mL) and 8.6g of SO3The following data were obtained when a test tube containing barium chloride hydrate was weighed before and after heating. The heating process drove off the water that was in the sample, producing an anhydrous salt. a) Mass of an empty test tube = 18.42g b) Mass of the test tube containing hydrate (before heating) = 20.75; c) Mass of the test tube containing anhydrous salt (after heating) = 20.41g The general formula of barium chloride is BaCl2 · nH2O, where n is the number of water molecules. The hydrate described by the data above either has a value of n=1; n=2; or n =3. Calculate the mass percent of water for each of these possible values of nCocaine (C17H21O4N) is a natural substance found in the leaves of the coca plant, which has been used for centuries as a local anesthetic and stimulant. Illegal cocaine arrives in the USA either as a pure compound or as the hydrochloride salt (C17H21O4NHCl). At 25oC, the salt is very soluble in water (2.50 kg/L), but pure cocaine is much less so (1.70 g/L). What is the maximum amount of salt (in gram) that can dissolve in 50.0 mL of water? [1 mark.] When a 25 mL aqueous solution that contains 62.50 g of the salt is treated with NaOH, the salt is converted to pure cocaine. How much water (in liters) is needed additionally to dissolve the formed pure cocaine? Round your final answer off to two decimal points. C17H21O4NHCl(aq) + NaOH(aq) → C17H21O4N(aq) + H2O(l) + NaCl(aq)
- The manufacture of aluminum includes the production of cryolite (Na3AlF6) from the following reaction: 6〖HF〗_((g))+3〖NaAlO〗_(2(s))→ 〖Na〗_3 〖AlF〗_(6(s))+3H_2 O_((l))+ 〖Al〗_2 O_(3(s)) How much HF (hydrogen sulfide) is required to produce 2.50kg of Na3AlF6? How many cm3 of HF(g) are needed to produce 26.0g of Na3AlF6? The density of HF (g) at 25is 1.15g/L.You are given a crushed sample that is a mixture of limestone (calcium carbonate), lime (calcium oxide), and sand. The calcium carbonate, or limestone, is the only material present in the mixture that will decompose when heated. You subject a 6.0685 g sample of the mixture to strong heating and after the sample reaches constant mass (no more mass is lost with additional heating), the sample has a final weight of 3.9247 g. What is the percentage of calcium carbonate present in the original mixture? (MW of calcium carbonate = 100.1 g/mol) Equation for reaction = CaCO3(s) -> CaO(s) + CO2(g).Wine is approximately 12% ethanol (CH3CH2OH) by volume. Ethanol has a molar mass of 46.06 g/moland a density 0.789 g/mL. How many moles of ethanol are present in a 750-mL bottle of wine?(% by vol calculation, then density, then g→ mol)
- The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18) and calculate how many kilograms of carbon dioxide are added to the atmosphere per 7.8kg of octane burned.24. Sulfur trioxide reacts with water to produce H2SO4. How much sulfuric acid, in grams, can be produced from 10.0 mL of water (d = 1.00 g/mL) and 25.6 g of SO3? use dimensional analysis. Gypsum has the formula CaSO4?2H2O. Plaster of Paris has the chemical formula CaSO4?12 H2O. In making wall plaster, water is added to plaster of Paris and the mixture then hardens into solid gypsum. How much water (in liters, at a density of 1.00 kg L-1 ) should be added to 25.0 kg of plaster of Paris to turn it into gypsum, assuming no loss from evaporation?
- Combustion of hydrocarbons such as butane (C4H10) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth's atmosphere can trap the Sun's heat, raising the average temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide. 1. Write a balanced chemical equation, including physical state symbols, for the combustion of gaseous butane into gaseous carbon dioxide and gaseous water. _________________________________________________________ 2. Suppose 0.450kg of butane are burned in air at a pressure of exactly 1atm and a temperature of 14.0°C. Calculate the volume of carbon dioxide gas that is produced. Be sure your answer has the correct number of significant digits. ____ LCombustion of hydrocarbon such as heptane produces carbon dioxide, a greenhouse gas. Greenhouse gases in the earths atmosphere can trap the suns heat, raising the average temperature of the earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.  A. Write a balanced chemical equation, including physical state symbols, for the combustion of liquid heptane into gaseous carbon dioxide and gaseous water. B. Suppose 0.260kg of heptane are burned in air at a pressure of exactly 1 atm and a temperature of 18°C. Calculate the volume of carbon dioxide that is produced in liters. Round your answer to three significant digits.How many moles of NaOCl would be present in 1 gallon of commercial bleach (density = 1.05 g/ml), which is 6.25% mass percent active ingredient. (1 L = 1.057 qt.)