Mass(grams)4. Mole Concept:MolarmassMolesa. How many moles are there in 66 grams of Carbon dioxide, CO,?e/mol) (mol)b. How many grams are there in 49 grams of sulfuric acid, H,SO.?C. An unknown compound was found at a crime scene in a Ziploc bag which had a label that read 2.5moles. The forensic scientist weighed the bag and found the mass of the compound to be 355 grams.The scientist was debating it to be P,O, or P,0,. As a chemistry student at FJC, please help the scientistto identify the compound. Show appropriate work!!DF

Answered: Image /qna-images/answer/466cb167-acfa-4380-863b-f12c137f3cc0.jpg

4. Mole Concept: a. How many moles are there in 66 grams of Carbon dioxide, CO,? b. How many grams are there in 49 grams of sulfuric acid, H2SO.? C. An unknown compound was found at a crime scene in a Ziploc bag which ha moles. The forensic scientist weighed the bag and found the mass of the compe The scientist was debating it to be P,O, or P,O.. As a chemistry student at FJC, p to identify the compound. Show appropriate work!!

4. Mole Concept: a. How many moles are there in 66 grams of Carbon dioxide, CO,? b. How many grams are there in 49 grams of sulfuric acid, H2SO.? C. An unknown compound was found at a crime scene in a Ziploc bag which ha moles. The forensic scientist weighed the bag and found the mass of the compe The scientist was debating it to be P,O, or P,O.. As a chemistry student at FJC, p to identify the compound. Show appropriate work!!

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter3: Mass Relations In Chemistry; Stoichiometry

Section: Chapter Questions

Problem 1QAP: One chocolate chip used in making chocolate chip cookies has a mass of 0.324 g. (a) How many...

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DDT, an insecticide harmful to fish, birds, and humans, is produced by the following reaction: In a government lab, 1142 g of chlorobenzene is reacted with 485 g of chloral. a. What mass of DDT is formed, assuming 100% yield? b. Which reactant is limiting? Which is in excess? c. What mass of the excess reactant is left over? d. If the actual yield of DDT is 200.0 g, what is the percent yield?
Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI Are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass?
One chocolate chip used in making chocolate chip cookies has a mass of 0.324 g. (a) How many chocolate chips are there in one mole of chocolate chips? (b) If a cookie needs IS chocolate chips, how many cookies can one make with a billionth (1109) of a mole of chocolate chips? (A billionth of a mole is scientifically known as a nanomole.)
Alex has a big black tattoo of a teddy bear on their back. Iron (II, III) oxide was used as the tattoo ink and has the chemical formula Fe,O;. a. What is the molar mass of iron (IL, III) oxide? b. Alex's mass before getting the tattoo was 61.5 kg. The tattoo contains 5.20x1023 molecules of iron (II, III) oxide. What is Alex's mass (in kg) after getting the tattoo?
A mixture of two hydrocarbons, C8H18 (octane) and C7H8 (toluene), has a mass of 183 g. The hydrocarbon mixture is burned in excess oxygen to form a mixture of carbon dioxide and water that contains 1.39 times as many moles of carbon dioxide as water. Find the masses of C8H18 and C7H8 in the mixture. mass of C8H18: ? mass of C7H8: ?
Citric acid (right) is concentrated in citrus fruits and plays a central metabolic role in nearly every animal and plant cell. (a) What are the molar mass and formula of citric acid? (b) How many moles of citric acid are in 1.50 qt of lemon juice (d = 1.09 g/mL) that is 6.82% citric acid by mass?
Aspartame is an artificial sweetener that is 160 times sweeter than sucrose (table sugar) when dissolved in water. It is marketed as NutraSweet. The molecular formula for aspartame is C14H18N2O5. a) Calculate the molar mass of for 2 moles of aspartame. b) How many moles of molecules are present in 35.0 g of aspartame? c) Calculate the mass in grams of 4.56 mol of aspartame. d) How many molecules are in 4.0 ng of aspartame? e) How many atoms of oxygen are in 2.2 g of aspartame? f) What is the mass in grams of 1.0 x 10^32 molecules of aspartame? g) What is the mass in grams of three molecules of aspartame?
0.279 g of the hydrate CoCl2•nH2O is heated to produce 0.197 g of anhydrous CoCl2 (MM = 129.83 g/mol). We want to use this to determine n, how many waters of hydration were in the original sample, be the end of the questions that follow. How many grams of water were in the original 0.279 g of hydrate? How many grams of CoCl2 were present on the original 0.279 g of hydrate? So ... we now have (as a result of the previous two questions) what we need to know to determine the empirical formula of CoCl2•nH2O. We can look at CoCl2•nH2O in this way (CoCl2)x•nH2O. Recalling that x and n are whole number molar ratios ... use the results of the last two problems to determine the correct formula.
0.279 g of the hydrate CoCl2•nH2O is heated to produce 0.197 g of anhydrous CoCl2 (MM = 129.83 g/mol). We want to use this to determine n, how many waters of hydration were in the original sample, be the end of the questions that follow. How many grams of water were in the original 0.279 g of hydrate? How many grams of CoCl2 were present on the original 0.279 g of hydrate?
One sample of CaC2, contains 0.150 mol of carbon. How many moles and how many grams of calcium are also in the sample? [Calcium carbide, CaC2, was once used to make signal flares for ships. Water dripped onto CaC2, re acts to give acetylene (C₂H₂), which burns brightly.]
Convert 5.70 mol NaCl to moles of CaCl2, using the equation given below. Round to the nearest 0.01, and remember to include units (properly abbreviated) and substance in your answer! Na3PO4 + CaCl2 --> Ca3(PO4)2 + NaCl
Thank you for the answer, but I'm confused for part b why do you multiply by 2? Isn't it 1 mol of Na2CO3 for every 2 moles of AgNO3? If that's the case wouldn't you divide by 2 like in part a? Cause I tried it mself, got 0.03 moles AGNO3 like answer... My Stoichiometry Calc...0.03 moles AGNO3 x (1 mol Na2CO3)/(2 mol AgNO3) x (105.99 Na2CO3)/(1 mol Na2CO3)=1.5898g I don't think my calc is correct answer but confused why multiply by the 2 instead...