Answered: For a lab in biodiesel: I weighed out:…

World of Chemistry

7th Edition

ISBN:9780618562763

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter10: Energy

Section: Chapter Questions

Problem 38A

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13) 16.0 grams of a certain food contain 130 calories. How many grams of this food would you need in order to consume 2150 calories? 14) The speed of sound in air is about 343 m/s. What is this speed in miles per hour? 15) If the gas in England costs £2.99/1, what is the cost in $/gal? (assume E1.00 = $1.50) 16) Calculate the density of mercury (13.6 g/cm) in units of kg/m³. 17) The daily dose of antibiotic for the treatment of an ear infection is 115 mg/kg of body weight. If the antibiotic tablets are available in 250. mg size, calculate the number of tablets that a 33.5 lb. child must take per day. 1 1
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If you purchase 1 bottle of 120 tablets of 650. mg sodium bicarbonate in the pharmacy aisle (the cheapest I found was $4.99), you are paying a significant amount of money for the bottling, capsuling and mark-up. You can purchase for $28.99 at www.amazon.com 30.0 pounds of sodium bicarbonate. How many bottles of tablets can you make out of the 30.0 lbs of NaHCO3 if you already have the capsules, labeling and bottles? If you are able to sell each bottle for $4.99 , once subtracting the $28.99 for the cost of the sodium bicarb, what is the gross profit before other bills?
1. A sample of coal has the following composition by mass: 76% C, 8%H, 6%O, 4%N, 2%S, 4% ash Calculate HCV and LCV, in kcal/kg, using Dulong's formula.
The active ingredient of Benadryl© Chesty Forte Cough Liquid is Guaiphenesin an expectorant drug used to assist the expectoration ('bringing up') of phlegm from the airways in acute respiratory tract infections. A 200.0 mL bottle of Benadryl© Chesty Forte Cough contains 4.00 g of Guaiphenesin (C10H14O4). If the recommended dose for a child is 150 mg of Guaiphenesin. What volume of the cough liquid should be administered?
The active ingredient of Benadryl© Chesty Forte Cough Liquid is Guaiphenesin anexpectorant drug used to assist the expectoration ('bringing up') of phlegm from theairways in acute respiratory tract infections. A 200.0 mL bottle of Benadryl© ChestyForte Cough contains 4.00 g of Guaiphenesin (C10H14O4). i. If the recommended dose for a child is 150 mg of Guaiphenesin. What volume of thecough liquid should be administered?
Part A: How many moles of O2 are needed to burn 1.65 mol of C8H18? Express the amount in moles to three significant digits. Part B: How many grams of O2 are needed to burn 14.0 g of C8H18? Express the mass in grams to three significant digits. Part C: Octane has a density of 0.692 g/mL at 20∘C. How many grams of O2 are required to burn 14.0 gal of C8H18? Express the mass in grams to three significant digits.
ity 7 Problem-Solving! ctions: Show your solution in the space provided. Follow the GFFSA (Given, Find, omula, Solution, Answer) format if possible. Write your answers in the space provided. (5 points each) 1. Combustion of hydrocarbons like methane (CH4) produces two products, water (H2O) and carbon dioxide (CO2). Consider the chemical equation of this combustlon: CH4 + 2 02- CO2 + 2 H20, when 4 mol of CHa reacts with 4 mol of O2, how many moles of CO2 are formed? What is the limiting reactant? 2. How many grams of lead II chloride are produced from the reaction of 16.2 g of NaCl and 62.0 g of Pb(NO3)27 What is the limiting reactant? How much excess is left over?
1:39 1 Send a chat Be sure to answer all parts. Nitroglycerin (C;H;N3O9) is a powerful explosive. Its decomposition may be represented by 4C3H3N3O9 → 6N2 + 12CO, + 10H20 + O2 This reaction generates a large amount of heat and gaseous products. It is the sudden formation of these gases, together with their rapid expansion, that produces the explosion. ok (a) What is the maximum amount of O, in grams that can be obtained from 7.50 × 10² g of nt nitroglycerin? g ences (b) Calculate the percent yield in this reaction if the amount of O, generated is found to be 24.5 %
02-Sadra is a college student studying chemistry. In one of his labs, he needs to add 10 grams of sodium carbonate to a mixture and analyze the results. When he is measuring the chemical on a weight sensor, he notices the amount of Na2co3 he is weighing is much larger than everyone else's, yet the sensor reads 10 grams. He dumps the chemicals back into the container and reweighs it, only to get the same result. Which of the following is accurate in describing Sadra's weight sensor? Not reliable, and not valid O Not reliable, but valid O Reliable, but not valid Reliable and valid Question 10 02-Dr. Narayan conducted a research study about the effects that coffee has on the brain. However, he told participants that it was an on-going survey on the amount of coffee they consumed on a day-to-day basis. This type of study is known as deception. Is it legally allowed in this situation and why? O Yes, but only if Dr. Narayan informed the participants of the true meaning of the study at the…
Lab Experiment-Woters of Hydration Page 4 Mandatory Pre-Lab for "Waters of Hydration" Please note that this pre-lab must be completed before performing the scheduled experiment Scenario: A test sample of 123 50 grams of hydrated copper sulfate (Cu50, HO) was heated above 300 deg. Celsius, and lost 23.50 grams from the heating process. Please determine the following from this data. (You will be solving for "n" in the formula above). Show your calculations Original sample weight (g): 123:50g Final Sample Weight (kong Mass of Water (g) Lost: 23:50g Mass of anhydrous salt; (8) long Moles of CuSO. (anhydrous): Moles of Water lost: 0-4 0:4009 *: 1:30g Ratio of Moles Water to Moles Cuso. 3:25g Calculations
A fluoridated water supply contains 3 mg/L of F-. What is the maximum amount of Ca 2+, expressed in grams per liter, that can exist in this water supply?

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For a lab in biodiesel: I weighed out: 50g of oil, 12g of methanol, and .2g of sodium hydroxide. what would the percent recovered be if I got 38.38g of biodiesel after separating?