IC_4603_L17_Molar_Mass

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The molecular weight of 2-propanol ( C3H7OH ), known as rubbing alcohol, is ________ amu (rounded to one decimal place). Group of answer choices 29.0 12.0 34.0 59.1 60.1

avallablé until you sign in again. Learning rning Ch 7 HW Najma Jama - > Normandale Community College - CHEM 1020 - Spring20 - NGWENDSON > Activities and Due Dates > Ch 7 HW ons く O Assignment Score: 42.6% L Give Up? O Hint Resources Check Answer く Question 8 of 23 100% Correct Suppose you have two samples that are equal in weight, 28.3 g Ni and 28.3 g Fe, O2. Calculate the number of moles of each substance. 85% Correct 100% Ni: mol Correct mol 0/100 Fe,O3: 100% Correct 100% Correct privacy policy terms of use contact us help about us careers arning, Inc. 13 59 6. Aa APR PDF 16 DD F12 DII F11 F10 F9 F8 F6 F5 F4 F3 F2 delete 24 4. * CO

Imole 1,5g Cu 504,3 X Imole ('u 5 0415H20 = Moles of anhydride used. (Show calculations) = Cu Soy • 5H20(s) A ('u 504 (5) + 5H20 (9) Hydrate » anhydride Moles of H₂O of hydration (Show calculations)= Ratio of moles of water to moles of anhydride (Show calculations.) = Molarmass = (to correct sig. figs. - do not round yet) Based on your data, what is the empirical formula of your hydrate (round your ratio to the closest whole number)? Use the Argumentation Framework (see inside front cover) (Claim- Evidence- Justification) to justify your answer. 147 S 112 52

Cheap Cars For Sale.. 2C3CDXC O/10 SKILL L To be Cane sugar is a white, odorless, crystalline powder with a sweet taste with the formula C12H2201. What is the percent composition of hydrogen in cane sugar? a 4.2% b 6.5% 51.5% 72.4% Check it Improve this question 2 SCRATCHPAD

how many moles (of molecules or formula units) are in each sample? express your answer to four sig figs 54.69g CF2CL2 26.6 kg Fe(NO3)2 159kgCaO

11:10 l LTE Question 21 of 60 Submit Aluminium has a density of 2.70 | g/cm³. How many moles of aluminum are in a 13.2 cm3 block of the metal substance? STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 35.6 13.2 molecules Al 1.32 g Al/mol 2.70 g/cm3 0.100 g Al 962 1 cm3 6.022 x 1023 0.489 26.98 Tap here or pull up for additional resources

Determine the mass in grams of 1.6 x 10-3 mol glucose, CsH12O6 TARTING AMOUNT ADD FACTOR ANSWER RESET *( ) %3D 6.022 x 1023 12.01 0.29 180.18 0.13 9.6 x 1020 1 1.6 x 10-3 84.18 g C6H12O6 mol CoH12Oe g CeH12O6/mol molecules CH½O6

ock Learning Goal: The conversion factor between mass and number of moles is called molar mass. By consulting the periodic table, we can determine that the molar mass of NaCl is 23.0 g/mole + 35.5 g/mole = 58.5 g/mole This number tells us that 1 mole of NaCl has a mass of 58.5 g The conversion factors are 58.5 g 1 mole and esc Here is an example of the conversion of 12.0 moles of NaCl to grams using the first conversion factor: 12.0 moles x 1 Q 1 mole 58.5 g F1 A 58.5 g 1 mole 2 JE -702 g F2 W S JUL 27 20 # 3 F3 E D DO $ 4 F4 Part A R What is the mass of 5.60 moles of magnesium chloride, MgCl₂? Express your answer with the appropriate units. ▶ View Avallable Hint(s) mass of MgCl₂ Submit Part B F How many moles of nitrogen, N, are in 71.0 g of nitrous oxide, N₂O? Express your answer with the appropriate units. ►View Available Hint(s) Value % са HA 5 F5 T μA Value 6 G Units MacBook Air F6 DELET FORMARE Y & 7 ? H Units stv F7 U ▶11 8 J ? A FB

QUESTION 31 Separation of a mixture of sand, NaCl and CaCO3 Part 3 (Values from this part may be used on parts 1&2) Mass of evaporating dish and sand 8.32 g Mass of evaporating dish Mass of sad 714 g Percent of sand a) What is the mass of sand in this sample? b) What is the mass percent sand in this sample? For the toolbar, press ALTF10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial Ω Click Save and Submit to save and submit. Click Save All Answers to save all ans

Please answer all three questions on the prelab section. Thank you.

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QUESTION 3 Hydrocortisone valerate is an ingredient in hydrocortisone cream, prescribed for skin problems. Its molecular formula is C 26H 380 6. What is the percent by mass of carbon in hydrocortisone valerate? O a. 43.6% O b.76.9% O c. 60.1% O d. 69.9% O e. 54.2% Click Save and Submit to save and submit. Click Save All Ansuers to save all answers. Esc F6 F7 F8 F10 F11 F12 Insert 3 4 5 7 8 E S D F H J K

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(Incorrect) A mixture of KBr and K₂S of mass 20.4 g contains 12.2 g of potassium. What is the percent by mass of KBr in the mixture? 29.2% (Correct answer) 27.7% (Your answer) 72.3% 70.8% 5.96%

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

Peak A has a height of 150 mm and a width at half height of 8.5 mm. Peak B has a height of 116 mm and a width at half height of 7 mm. What would the % composition of Peak A be? Please give your answer as a whole number and do not include "%". Question 8 Peak A has a height of 98 mm and a width at half height of 8 while peak B has a height of 101 and a width at half height of 10. What is the percent composition of peak B? Please give your answer as a whole number and do not include "%".

Calculate the moles of KHP titrated in each trial = M x L = 0.5 M x 0.025 L= Calculate the moles of NaOH using stoichiometry of the reaction

% composition of sodium

Data Trial 1 Trial 2 Mass of empty crucible with lid 26.698g 26.687g Mass of Mg metal, crucible, and lid 27.060g 27.046g Mass of MgO, crucible, and lid 27.291g 27.273g   Determine the average percent yield of MgO for the two trials.  ( I average the percent yield of the two trials)                      98.55%   (Just write out how you got it)

Aktiv Chemistry ADD FACTOR *( ) 75.53 Determine the quantity of moles in 4.21 x 1023 formula units of CaCl₂ X + 0.699 Colmal Question 4 of 14 77.6 6.022 × 1023 3.79 × 10²¹ 6.99 mal CoCL ANSWER DELL 1 RESET 4.21 x 1023 fammula ito CoCL 3 110.98

emistry 8.0 ADD FACTOR Determine the quantity of oxygen molecules in 3.00 moles of oxygen *( ) X + 6.022 × 1023 98 x 10-24 5.78 x 10²5 Question 7 of 14 6.022 x 1024 2 1.81 × 10²5 44.00 1 ANSWER 32.00 96.0 2.00 x 1023 RESET 3.00 3 2.89 x 1025 16.00 1.81 x 1024

CHEM 1315 03-Gene X e At app.101edu.co Aktiv Chemistry 6 Aktiv Chemistry X + Question 3 of 5 What is the mass in grams of 35.00 moles of KBr? DELL

13. A sample of 15.00 g of a hydrated sodium sulfate salt contains 7.05 g of water. The value of the "x" in the hydrated salt is:  NaSO4 . xH2O    Answers:  a)7  b)10  c)1  d)3  e)5

What is the percent error of an experiment that was supposed to produce 19g of NaCl but only produced 10g? 5 -190% 10% Ⓒ53% 47% 6 A 6 DELL 7 O * 8 O +

How do you find the Moles and mass of acetic acid in vinegar How do you find the Molarity and Average molarity of acetic acid in vinegar How do you find the % by mass, the Average % mass, and Standard deviation of % of acetic acid in vinegar