O Chem Lab

7. You are helping to clean out the lab at the end of the term and find a bottle of liquid whose label has smudged. You know from its location that the bottle contains propanol (C3H8O), ethyl acetate (C4H8O2), or both. You burn 0.300 g of the liquid and obtain 0.624 g of carbon dioxide. What compound(s) do you have in the bottle, and what is their percent by mass in the 0.300-g sample?

Select the coefficients necessary to balance each equation. Choose a coefficient for every compound. 1. Choose... C2H6 + Choose... - O2 Choose... CO2 + Choose... H20 2. Choose... C2H2 + Choose... O2 Choose... CO2 + Choose... H,O

One quick follow up...this works well with adding 13 moles. Do you use the same math if fewer or more moles were added? For exampl, what if 5 moles of AB2+ were added? Or 20 moles of AB 2+ were added?

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help me pls less than 15 mins i'll give you upvote.

Consider this reaction:             Toluene --->  Benzylbromide                   (this reaction has a 1 to 1 ratio of reactants to products) Toluene (MW 92.141, d 0.87)  Benzylbromide (MW 171.037, d 1.438)   If you start with  24 mL of toluene, how many mL of benzyl bromide can you produce? round your answer to the nearest milliliter.

Pre Lab Quiz Lab 3 1. A hydrated FeBr2 salt weighing 1.782 g is heated in a crucible until reaching a constant mass. The weight of the anhydrous FeBr2 is 1.437 g. Calculate the percent by mass of water in the hydrated FeBr2 salt. a. b. Calculate the moles of H20 removed from the hydrate. Calculate the moles of anhydrous FeBr2 remaining in the crucible. с. d. What is the formula of the hydrated FeBr2?

Please help ASAP, thank you! "Calculate the mass of diethyl ether (in grams) given the values listed in the reaction scheme. Keep your answer to 2 decimal places."

Select the best answer. 1.) MeMgBr (excess) 2)H*, HO 3.) NaH 4.) CH "R" abbreviation for answers b.) R. R

4. If sugar is melted to the liquid state and then allowed to condense back into a solid has anything happened to change the sugar molecules? Explain your answer. (2-3 sentences)

The chemical reaction to make acetylsalicylic acid (aspirin) is shown below. C7H6O3 + C4H6O3 ----> C9H8O4 + C2H4O2 salicylic acid + acetic anhydride ----> acetylsalicylic acid + acetic acid Answer the following questions regarding this reaction. a. If you weighted 3.65 g of salicylic acid, how many grams of aspirin would be created? Use correct number of significant figures, do not write units, write numbers only. b. If the average percent yield of this type of reaction is 95%. How many milligrams of salicylic acid do you need to weight to make 325 mg (an adult dose) of aspirin tablet? Use correct number of significant figures, do not write units, write numbers only.

HSC 258 Major Projec X Mind Tap - Cengage Lea X d%3D55750828934189288909969212&elSBN=9781305657571&snapshotld%3D219989 The illustration to the left represents a mixture of iodine ( purple ) and fluorine ( green ) molecules. If the molecules in the above illustration react to form IF3 according to the equation I +3 F2 2 IF3 , the limiting reagent is the number of IF, molecules formed is and the number of atoms/molecules in excess is Submit Answer

du.co Question 10 of 22 Balance the following chemical equation (if necessary): CH(g) + O,(g) → H,O(g) + CO,(g) 04- 03. 02. O+ O2+ D3+ 04+ 1 4 7 8 9. O3 04 Os + (s) (1) (g) (aq) CO CH.0 H,O Reset • x H,O Delete MacBook Air 80 DII F3 F4 F7 F8 F9 @ $ & 2 4 5 6 8 9 W E R Y S D F G H J K C V B M * CO *3

Name Date Block Percent Composition and Molecular Formula Worksheet 1. Calculate the percent of nitrogen in urea, NH¿CONH,. 2. Calculate the percentage of water in zinc sulfate heptahydrate. 3. Calculate the percentage of oxygen in potassium chlorate. 4. Calculate the percentage of tin in potassium stannate trihydrate, K2SNO3 •2H2O Write the molecular formulas of the following compounds: 5. A compound with an empirical formula of C:OH4 and a molar mass of 88 grams per mole. 6. A compound with an empirical formula of C.H.O and a molar mass of 136 grams per mole. 7. A compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole. 8. A compound with an empirical formula of C:H&N and a molar mass of 46 grams per mole. Answer the following questions: 9. The percentage composition of acetic acid is found to be 39.9% C, 6.7% H, and 53.4% O. Determine the empirical formula of acetic acid. 10. The molar mass for question #9 was determined by experiment to be 60.0 g/mol.…

the top one is also an option- is that not correct?

hello please help using the completed table

Aktiv Chemistry ADD FACTOR 4.3 × 10²¹ X A 52 kg woman has 7.2 x 10-3 mol of hemoglobin (molar mass=64456 g/mol in her blood. What quantity of hemoglobin molecules is this? 460 + 1.1 x 107 mal hamaglahin Question 5 of 14 6.022 x 1023 52 homoalahin 7.2 x 10-³ almal ANSWER DELL 1 64456 RESET 3 malamlaa hamaalahin 1.2 x 10-26

keAssignment/takeCovalentActivity.do?locator-assignment-take M) red req req eq eq eq eq eq eq Use the References to access important values if needed for this question. A compound is found to contain 42.88 % carbon and 57.12 % oxygen by mass. What is the empirical formula for this compound? To answer the question, enter the elements in the order presented above. Submit Answer Retry Entire Group 9 more group attempts remaining

Vse 14.01 g.mol-1 4. Use the balanced reaction to answer the Question 11.015 mol-¹ and lu.00 g.mol 4 NH3(g) +502 19) -74 ND 19) + 6H2019) what is produced when 1000 grams ammonia react with 200.0 grams of oxygen? spremant ob CASVACE #w/c/1624013S (20051271 2010m the R 14 POHRE? 451201001 M 1964) 44 319691

4. How many grams of acetylene would be given off if the limiting reagent in the reaction is calcium carbide and you start with 2.00 g? fw CaC2 = 64.1 g/mol fw C2H2 = 26.0 g/mol BIIIU X2 | X² | → EEE Normal 5. Draw two resonance structures for benzene (C6H6). Upload an image (.heic or .jpg file) or your structures.

QUESTION 1 Indicate whether the following experimental mistake will increase, decrease, or have no effect on the calculated value of R. In adjusting the final water level after the O2 was produced, the student adjusted the levels to the bottom of the water in the beaker and the top of the water in the flask (rather than correctly the top of each). See image below. Select ALL of the correct answers. Delivery Tubing Beaker Florence Flask a. The value of the calculated R is low. b. Water flows from the flask to the beaker. c. The volume measured from the beaker is unaffected. d. The value of the calculated R is high. e. The volume measured from the beaker is low. f. Water does not flow under these circumstances. g. Water flows from the beaker to the flask. h. The value of R is unaffected. O i. The volume measured from the beaker is high.

Construct the expression for Kc for the following reaction. Question 8 of 35 [H0] CH,COOH(aq) + H₂O (1) CH,COO (aq) + H₂O'(aq) Drag the tiles into the numerator or denominator to form the expression. Each reaction participant must be represented by one tile. Do not combine terms. Kc = 2[H₂01 [H,0⁰ [H,01 2[H,0² 2[H,0] [CH₂COO] 2(CH,COO] (CH,COOP 2[CH,COO [CH,COOH] 2(CH,COOH] [CH,COOH!" 2[CH,COOH!" 2[H,01¹ RESET [H₂O]"

Think carefully about how you would measure the amount of NaHCO_3NaHCO3​ present in one Alka-Seltzer tablet and when you have your thoughts concretized, write out a step-by-step procedure here. Remember to include how you would run the reaction and ALL the mass measurements that you think you would need to make.