2.A mixture of Na2SO4 and its hydrate Na2SO4-10H2O has a mass of 1.5099 g. After heating to drive offall the water, the mass is only 1.1410 g. What is the weight percentage of Na2SO4-10H2O in the originalmixture? Report your answer to 4 significant figures.Molar masses: Na,SO4 142.04 g/mol; Na,SO4•10H2O 322.19 g/mol.

Mass percent :- The mass of a component present in 100 grams of a mixture is known as mass…

2. A mixture of Na2SO4 and its hydrate Na,SO4-10H2O has a mass of 1.5099 g. After heating to drive off all the water, the mass is only 1.1410 g. What is the weight percentage of NażSO4-10H2O in the original mixture? Report your answer to 4 significant figures. Molar masses: Na,SO4 142.04 g/mol; Na,SO4-10H,O 322.19 g/mol.

2. A mixture of Na2SO4 and its hydrate Na,SO4-10H2O has a mass of 1.5099 g. After heating to drive off all the water, the mass is only 1.1410 g. What is the weight percentage of NażSO4-10H2O in the original mixture? Report your answer to 4 significant figures. Molar masses: Na,SO4 142.04 g/mol; Na,SO4-10H,O 322.19 g/mol.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Please help me, and double and triple check your answers previous tutors got questions wrong
S + 6 HNO3 --> H₂SO4 + 6 NO2 + 2 H₂O In the above equation how many moles of water can be made when 162.9 grams of HNO3 are consumed? Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0 Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.: Molar Element Mass Hydrogen 1 Nitrogen 14 Sulfur 32 Oxygen 16
(0) Mass of FeCl2 (g) Volume of KMnO4(mL) Molarity of KMnO4 Trial 1 1.9986 33.81 0.0185 Trial 2 2.0237 32.33 0.0185 Trial 3 2.002 33.58 0.0185 The molecular weight of FeCl2 is 151.91 g/mol. In this assignment, you will determine the mass % of an unknown sample of ferrous chloride (FeCl2) by titrating it with a KMnO4 solution of known concentration. 11. What is the average % iron in the unknown sample using your best three answers?
a.) A compound's percent composition was discovered to be 63.5 percent silver, 8.2 percent nitrogen, and 28.3 percent oxygen. Find out what the empirical formula of the compound is. b.) Calculate the percentage composition of the compound Al2(OH)5CI, which is used in an active antiperspirant formulation.
The chemical formula for chlorophyll is C₅₅H₇₂MgN₄O₅. a) What is the molar mass of the compound? Provide an answer to two decimal places. b) What is the percent by mass of carbon in the compound? c) What is the mass in grams of chlorophyll that are in 2.185 moles of the compound? d)What quantity in moles of chlorophyll are there in 2.185 grams of the compound?
0.848g of Na2B4O7.10H2O into a crucible. After hearing the sample for a short time and allowing the crucible to cool, the two students determine that the sample has a mass of 0.525g. They then do a quick calculation. based on this calculation, what should they do next?
2. A mixture of KCr(SO4)2 and its hydrate KCr(SO4)2-12H₂O has a mass of 1.2843 g. After heating to drive off all the water, the mass is only 1.1079 g. What is the weight percentage of KCr(SO4)2-12H₂O in the original mixture? Report your answer to 4 significant figures. Molar masses: KCr(SO4)2 283.22 g/mol; KCr(SO4)2-12H₂O 499.40 g/mol.
1b Mole calculations Multimedia activities
6. Consider the following chemical reaction: 2 Cr(OH)3(aq) >Cr₂O3(s) + 3H₂0(1) 12.00 moles of chromium (III) hydroxide is decomposed. Calculate moles of the water produced. O 18.00 moles O 1.500 moles O 4.00 moles O 12.00 moles
7 Sodium azide (Na,N) decomposes on heating to form sodium and nitrogen gas. 2Na,N → 6Na + N2 1.35g of sodium nitride were heated. a Calculate the mass of sodium formed on complete decomposition of the sodium nitride. Give your answer to 3 significant figures. (AO2) 3 marks b Calculate the volume of nitrogen gas (in cm³) produced on complete decomposition of 1.35 g of sodium nitride at 320K and 110kPa. The gas constant R = 8.31JK-'mol-'. Give your answer to 3 significant figures. (AO2) 3 marks
To help farmers and gardeners , commercial fertilizers have a big three -number "NPK" label on the bag that gives the amounts of three key plant nutrients: nitrogen , phosphorus and potassium. For example , a bag of "-10-10-10" fertilizer has 10% by mass nitrogen , 10% by mass potassium as potash (K2O), and 10% by mass phosphorus as phosphate (P2O5). Suppose a certain fertilizer has the following composition. What should the first (nitrogen) number on the bag label be? That is, calculate the the percent by mass of nitrogen in this fertilizer. Round your answer to the nearest percent.
A compound contains arsenic (As) and oxygen as its only elements. A 1.626 gsample of the compound contains 1.060 g of arsenic.What is the empirical formula for the compound?If the molecular mass is 395.7 g/mol, what is the molecular formula for this compound?