HomeworkLib
Question

A powder contains FeSO4 7 H,O (molar mass = 278.01 g/mol), among other components. A 3.995 g sample of the powder was dissolv

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

mass of FeSO4.7H2O = 0.731 g

Explanation

mass Fe2O3 = 0.210 g

moles Fe2O3 = (mass Fe2O3) / (molar mass Fe2O3)

moles Fe2O3 = (0.210 g) / (159.69 g/mol)

moles Fe2O3 = 1.315 x 10-3 mol

moles FeSO4.7H2O = 2 * (moles Fe2O3)

moles FeSO4.7H2O = 2 * (1.315 x 10-3 mol)

moles FeSO4.7H2O = 2.63 x 10-3 mol

mass FeSO4.7H2O = (moles FeSO4.7H2O) * (molar mass FeSO4.7H2O)

mass FeSO4.7H2O = (2.63 x 10-3 mol) * (278.01 g/mol)

mass FeSO4.7H2O = 0.731 g

0 0
Add a comment
Know the answer?
Add Answer to:
A powder contains FeSO4 7 H,O (molar mass = 278.01 g/mol), among other components. A 3.995...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A powder contains FeSO4⋅7H2O (molar mass=278.01 g/mol),(molar mass=278.01 g/mol), among other components. A 3.455 g sample...

    A powder contains FeSO4⋅7H2O (molar mass=278.01 g/mol),(molar mass=278.01 g/mol), among other components. A 3.455 g sample of the powder was dissolved in HNO3 and heated to convert all iron to Fe3+. The addition of NH3 precipitated Fe2O3⋅?H2O, which was subsequently ignited to produce 0.502 g Fe2O3. What was the mass of FeSO4⋅7H2O in the 3.455 g sample? Please include every step.

  • A powder contains FeSO4⋅7H2OFeSO4⋅7H2O (molar mass=278.01 g/mol),(molar mass=278.01 g/mol), among other components. A 2.595 g2.595 g...

    A powder contains FeSO4⋅7H2OFeSO4⋅7H2O (molar mass=278.01 g/mol),(molar mass=278.01 g/mol), among other components. A 2.595 g2.595 g sample of the powder was dissolved in HNO3HNO3 and heated to convert all iron to Fe3+.Fe3+. The addition of NH3NH3 precipitated Fe2O3⋅xH2O,Fe2O3⋅xH2O, which was subsequently ignited to produce 0.413 g Fe2O3.0.413 g Fe2O3. What was the mass of FeSO4⋅7H2OFeSO4⋅7H2O in the 2.595 g2.595 g sample? mass of FeSO4⋅7H2OFeSO4⋅7H2O:

  • 21 Twenty dietary iron tablets with a total mass of 20.131 g were ground and mixed...

    21 Twenty dietary iron tablets with a total mass of 20.131 g were ground and mixed thoroughly. Then 2.998 g of the powder were dissolved in HNO3 and heated to convert all the iron (FeSO4.7H20) to Fe2O3.XH20. Addition of NH3 precipitated Fe,O3.XH20, which was ignited to give 0.264 g of Fe2O3 (M.wt. = 159.69 g/mol). What is the average mass of FeSO4.7H20 (M.wt. = 278.01 g/mol) in each tablet? * (2 points)

  • 28 > The active ingredient in a zinc nutritional supplement is ZnSO, 7H, (molar mass=287.58 g/mol)....

    28 > The active ingredient in a zinc nutritional supplement is ZnSO, 7H, (molar mass=287.58 g/mol). Ten zinc tablets containing a mix of the active ingredient and an inactive filler were ground and mixed together thoroughly. The total mass of these 10 tablets was 11.285 g. A 2.056 g sample of the finely ground tablets was dissolved in an acidic solution. The solution was neutralized with ammonia and subsequently warmed in a water bath. Addition of (NH), PO, to the...

  • The active ingredient in a zinc nutritional supplement is ZnSO4 .7H2O (molar mass 287.58 g/mol). Ten...

    The active ingredient in a zinc nutritional supplement is ZnSO4 .7H2O (molar mass 287.58 g/mol). Ten zinc tablets containing a mix of the active ingredient and an inactive filler were ground and mixed together thoroughly. The total mass of these 10 tablets was 10.600 g. A 1.980 g sample of the finely ground tablets was dissolved in an acidic solution. The solution tion of (NH4)PO to the s the precipitation of ZnNH,PO4. The precipitate was filtered and dried, then ignited...

  • 25. FeO, (molar mass = 159.7 g/mol) reacts with CO (molar maw28.0 /mol) according to the...

    25. FeO, (molar mass = 159.7 g/mol) reacts with CO (molar maw28.0 /mol) according to the equation below. Calculate the number of moles of iron produced when 185,5 g CO reacts with excess F,O Fe(s) + 3 CO(g) - 300,() +2 Fe(s) A. 2.208 mol B. 13.25 mol C. 4.415 mol D. 9.93 mol E 3.311 mol 26. Tin(II) fluoride is added to some dental prod- ucts to prevent cavities. How many grams of tin(II) fluoride can be made from...

  • conversion factors needed: molar masses of O, and Ho, and molar ratio between Ozand Ho. Molar mass Oz: 2 x 16.00 g/...

    conversion factors needed: molar masses of O, and Ho, and molar ratio between Ozand Ho. Molar mass Oz: 2 x 16.00 g/mol = 32.00 g/mol Molar mass HO: (2x 1,01 g/mol)*16.00 /mol 7HO-1.5 80xmor 2 mol No1802 1,0 52.00 gomolo 1 .689 = 1.7 HO Now let's try some problems Be sure to give your answers with the correct number of significant figures. 1. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,...

  • Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the...

    Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT