Unknown Sample Number_ 13 Mass of sample, g Final buret reading, mL Initial buret Trial 1 0.244 Molar Mass of an Unknown Acid Data Sheet 44.08 40.79 Trial 2 0.2427 47.30 26.4 Trial 3 0.2245 40.40 28.9 Trial 4 0.2418 44.20 41.2 Trial 5 0.2341 44.00 40.9

Remaining Time: 1 hour, 01 minute, 47 seconds. * Question Completion Status: QUESTION 2 The number of water molecules in 2.3 mg of water is O 6.02 x 1023 O 77.0 x 1023 O 7.7 x 1023 O 7.7 x 1019 none of the above QUESTION 3 A ctudent makes a colution bu discolvina 254a ofNDOH int0 450 gof water Wh. Click Save and Submit to save and submit. Click Save All Answers to save all answer ere to search DELL

m/course.html?courseld=16481757&OpenVellumHMAC=feeaec83fa5cc7b2f32454414caf19a1#10001 Part C In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 140 g of chlorine gas. Express the quantity in moles to three significant figures. • View Available Hint(s) ? mol Moles of chlorine gas = Submit Previous Answers X Incorrect; Try Again Multi-step problems A problem that asked you to convert molecules to grams could require two steps 1. convert the molecules to moles P Pearson 2convert to moles to areme Copyright O 2021 Pearson Education Inc. All rights reserved. I Terms of Use | Privacy Policy I Permissions | Contact Us |

O 0.970 M QUESTION 37 A hospital saline solution is analyzed to confirm its concentration. A 50.0 mL sample with a mass of 50.100 g is evaporated to dryness. The solid sodium chloride residue has a mass of 0.656 g. What is the mass/mass percentage? O 2.51 % O 1.31 % O 13.1% O 3.77% QUESTION 38 A hosnital salinı

Empirical Formula for Unknown Sample Data1. Mass of crucible 28.072(grams)2. Mass of crucible + Unknown 30.528(grams)3. Mass of crucible + Na + S 29.782(grams)4. Mass of crucible + Na 28.786(grams)5. Mass of Na 0.714 6. Mass of S 0.996 7. Mass of O 0.7468. Mass of Unknown Sample 2.51 using the information above find the moles for the following elements: Moles of Na Moles of S Moles of O

Conc. of NaOH: TRIAL 1 TRIAL 2 TRIAL 3 Mass of flask 81.061 69.692 96.039 Mass of flask and vinegar 83.010 71.578 97.940 Mass of vinegar 1.949 1.886 1.901 Volume of vinegar 2.00 2.00 2.00 Initial buret reading Final buret reading 17.0 17.5 16.0

Volume (mL) Trial 1 Trial 2 Trial 3 Final volume (mL) 24.35 47.60 20.60 Initial volume (mL) 1.25 25.15 42.85 Volume Added 23.10 22.45 22.35 Average Volume Added 22.63 mL Concentration of NaOH 0.9971 M % Acetic Acid in Vinegar   Assuming all the acid to be acetic, calculate the number of grams of acid per 100 mL of vinegar solution. Assuming that the density of vinegar is 1.000, what is the percentage of acetic acid by weight in vinegar? Average your results in the usual manner. % of Acetic Acid = (mL of NaOH added)(concentration of NaOh)/mL of vinegar sample

Please show the work on notebook papers. 1,2,3,4 Part. Chemistry

I tried everything to find the correct answer for the expected mass for calcium but I can’t

I have the data, I only need the calculations of the last page.