To a crucible and cover weighing 33.392 g is added a sample of a copper (II) chloride hydrate (CuCl2 • nH2O). The mass of the crucible, cover and contents is 34.405 g. The hydrate sample was heated until all the water was driven off. Upon cooling, the sample plus crucible and cover weighed 33.881 g. The molar mass of anhydrous CuCl2 is 134.456 g/mol. (a) How many moles of water are in the hydrate? (b) How many moles of anhydrous CuCl2 are in the hydrate? (c) What is the formula of the copper (II) chloride hydrate?

To a crucible and cover weighing 33.392 g is added a sample of a copper (II) chloride hydrate (CuCl2 • nH2O). The mass of the crucible, cover and contents is 34.405 g. The hydrate sample was heated until all the water was driven off. Upon cooling, the sample plus crucible and cover weighed 33.881 g. The molar mass of anhydrous CuCl2 is 134.456 g/mol. (a) How many moles of water are in the hydrate? (b) How many moles of anhydrous CuCl2 are in the hydrate? (c) What is the formula of the copper (II) chloride hydrate?

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

A sample of soda-lime glass for tableware is analyzed and found to contain the following percentages by mass of oxides: SiO2, 72.4%; Na2O, 18.1%; CaO, 8.1%; Al2O3, 1.0%; MgO, 0.2%; BaO, 0.2%. (The elements are not actually present as binary oxides, but this is the way compositions are usually given.) Calculate the chemical amounts of Si, Na, Ca, Al, Mg, and Ba atoms per mole of O atoms in this sample.
Consider the reaction 3X + 2Y→ 5C + 4D How many moles of X are needed to produce 24.00 moles of D? If your answer is not a whole number, answer to the hundredths place.
You carefully weigh out 17.00 g of CaCO3 powder and add it to 68.85 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 78.88 g. The relevant equation is CACO3 (s) + 2HC1(aq)→H2O(1) + CO2 (g) + CaCl, (aq) Assuming no other reactions take place, what mass of CO2 was produced in this reaction?
One way to analyze for the amount of phosphorus in a rock is to precipitate the phosphorus as MgNH4PO4, which is then heated to turn it into Mg2P2O7. What weight of Mg2P2O7 will be obtained from a 2.832 g sample of a rock that contains 86.52% Ca3(PO4)2 (and no other source of phosphorus) if this analysis is done?
A mixture of hydrocarbons contains 39.1% heptane, C7H16, 10.7% nonane, C9H20, and 50.2% octane, C8H18. The mixture is combusted in an excess of oxygen. What mass of CO2 is generated from the combustion of 19.6 kg of the mixture?
Consider the following chemical reaction: 3Mg + B₂03 → 2B + 3 MgO. What mass in grams of magnesium oxide are formed when 100 g of B₂O3 is allowed to completion with excess magnesium ?
What mass in grams of the dihydrate H2C2O4 • 2 H2O (molar mass = 126.0 g/mol) is needed in order to deliver 23.5 grams of H2C2O4 (molar mass = 90.0) to the reaction vessel?
Chilean niter deposits are mostly sodium nitrate, but they also contain 0.3%iodine in the form of calcium iodate, Ca(IO3)2. After the sodium nitrate inthe niter is dissolved and recrystallized, the remaining solution contains 9 g/Lsodium iodate, NaIO3(aq). The NaIO3 is converted to iodine when it reactswith sulfur dioxide and water.2NaIO3 + 5SO2 + 4H2O → Na2SO4 + 4H2SO4 + I2a. How many liters of sodium iodate solution that contains 9 g of NaIO3 perliter would be necessary to form 127.23 kg of iodine, I2?b. What mass, in megagrams, of Chilean niter that is 0.3% I would benecessary to form the volume of sodium iodate solution you calculated inpart (a)
The balanced chemical equation is P₄(s) + 6 Cl₂(g) → 4 PCl₃(g). What is the mass in grams of phosphorus trichloride that can be formed from 226.0 grams of chlorine gas based on the balanced chemical equation?
A chemist needs 1.28 g of sodium hypochlorite, NaOCl(s), for an experiment, but she only has sodium hypochlorite pentahydrate, NaOCl•5H2O(s). How many grams of the hydrate should she use?
An important reaction that takes place in a blast furnace during the production of iron is the formation of iron metal and CO2 from Fe2O3 and CO. Find the mass of Fe2O3 required to form 870 kg of iron.
Which of the following reactions does the chemical equation below best represent? 3 Cu(CI), (aq) + 2 Al (s) → 3 Cu (s) + 2 AICI, (aq) formation of copper(ll) oxide upon heating a solution containing copper(Il) hydroxide O reaction of copper (II) oxide with hydrochloric acid O reaction of copper(l) nitrate with sodium hydroxide O reaction of copper(ll) chloride with elemental aluminum