Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- Ethylene (CH₂CH₂) is the starting point for a wide array of industrial chemical syntheses. For example, worldwide about 8.0 × 10¹0 kg of polyethylene are made from ethylene each year, for use in everything from household plumbing to artificial joints. Natural sources of ethylene are entirely inadequate to meet world demand, so ethane (CH3CH3) from natural gas is "cracked" in refineries at high temperature in a kinetically complex reaction that produces ethylene gas and hydrogen gas. Suppose an engineer studying ethane cracking fills a 80.0 L reaction tank with 14.0 atm of ethane gas and raises the temperature to 850. °C. He believes K₂=0.60 at this temperature. alo Calculate the percent by mass of ethylene the engineer expects to find in the equilibrium gas mixture. Round your answer to 2 significant digits. Ar Note for advanced students: the engineer may be mistaken about the correct value of K, and the mass percent of ethylene you calculate may not be what he actually observes. % 0x₁…arrow_forwardEvery year Every second (1 year 365 days).arrow_forwardA large freshwater (total mass of water 10^5 kg) lake contains no lithium. A sudden spill releases a constant lithium contaminated flow discharging 3.98*10^8 mg of lithium/hr. How long will it take until the lake reaches a lithium concentration of 1.1nmol/kg?arrow_forward
- NHẠNO3 MgSO4 [1] Mass of salt (g) 1.968 1.981 [2] Volume of DI water (mL) 50.0 50.0 0.039 0.0396 Mass of DI water (g) [3] Temperature of DI water (°C) 22.5 22.5 [4] Temperature of mixture after dissolution (°C) 19.5 27.1 3 4.6 Temperature difference (°C) [5] Total mass in reaction (g) [6] Enthalpy of solution AHsolution (cal/mol)arrow_forwardConsider the two spheres shown here, one made of silver and the other of aluminum. The spheres are dropped from a height of 1.7 m. Composition - aluminum Density= 2.70 g/cm³ Volume 196 cm³ Composition - silver Density 10.49 g/cm³ Volume=196 cm³ What is the kinetic energy of the silver sphere at the moment it hits the ground? (Assume that energy is conserved during the fall and that 100%% of the sphere's initial potential energy is converted to kinetic energy the time impact occurs.) Express your answer to two significant figures and include the appropriate units. Ek = Value Unitsarrow_forwardAgar plates typically contain 1.5% agar by weight. To make 500 ml of TSA, how many grams of agar would you add to your flask before filling it with TS broth for a total volume of 500 ml? (Assume the density of TS broth is the same as H2O).arrow_forward
- 3. Now that you know the physical state of each of the reactants and products in this chemical reaction lets think about what you might observe as the reaction is running. CH_3COOH(aq) + NaHCO_3(aq) → H_2O(l) + CO_2(g) + CH_3COONa(aq) Upload a screenshot that shows how you performed all the calculations in Q3.arrow_forwardExpressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J 1 kWh = 3.600 x 106 J J 202 kWh 199 kcal 226arrow_forwardWhich piece of equipment would you use to measure 7.10 mL of CuSO4 (aq)?arrow_forward
- Ethylene (CH₂CH₂) is the starting point for a wide array of industrial chemical syntheses. For example, worldwide about 8.0 × 10¹0 kg of polyethylene are made from ethylene each year, for use in everything from household plumbing to artificial joints. Natural sources of ethylene are entirely inadequate to meet world demand, so ethane (CH₂CH3) from natural gas is "cracked" in refineries at high temperature in a kinetically complex reaction that produces ethylene gas and hydrogen gas. Suppose an engineer studying ethane cracking fills a 35.0 L reaction tank with 35.0 atm of ethane gas and raises the temperature to 400. °C. He believes K₂=0.20 at this temperature. Calculate the percent by mass of ethylene the engineer expects to find in the equilibrium gas mixture. Round your answer to 2 significant digits. Note for advanced students: the engineer may be mistaken about the correct value of Kp and the mass percent of ethylene you calculate may not be what he actually observes.arrow_forwardA chemist prepares a solution of mercury(1) chloride (Hg₂Cl₂) by measuring out 1.96 mg of mercury(1) chloride into a 500. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's mercury (1) chloride solution. Be sure your answer has the correct number of significant digits. mol/L mo x10 x Sarrow_forwardPart H Write balanced net ionic equation for NazPO4(aq)+ CaCl2 (aq) → Ca3(PO4)2(s)+ NaCl(aq). Express your answer as a chemical equation. Identify all of the phases in your answer.arrow_forward
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