Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:Fe", Cr*", F", 0²-

Answered: Write the empirical formula of at least…

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.119PAE

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Chalky, white crystals in mineral collections are often labeled borax, which has the molecular formula Na2B4O7 10H2O, when actually they are partially dehydrated samples with the molecular formula Na2B4O7 5H2O, which is more stable under the storage conditions. Real crystals of borax are colorless and transparent. (a) Calculate the percent mass that the mineral has lost when it partially dehydrates. (b) Is the percent boron by mass the same in both compounds?
Calculate the mass in grams of 3.839 moles of (a) hydrazine, a rocket propellant. (b) caffeine, C4H5N2O. (c) theobromine, C7H8N4O2, the alkaloid present in chocolate and cocoa.
Write the empirical formula for at least four ionic compounds that could be formed from the following ions: 2+ 3+ Fe", OH¯, Fe*, PO 4 0,0,...
Write the empirical formula for at least four ionic compounds that could be formed from the following ions: Fe", Pb**, OH , CIO, Pb , OH, ClO,
If Epsom salt, MgSO, · ¤H2O, is heated to 250 °C, all the water of hydration is lost. On heating a 1.590-g sample of the hydrate, 0.777 g of MgSO, remains. How many molecules of water occur per formula unit of MgSO4? molecules
Write the empirical formula for at least four ionic compounds that could be formed from the following ions: PO, NH, I03, Fe2- Fe²* 4 ! (NH,), (PO,), O (РО, 4 0,0,...
Write the empirical formula for at least four ionic compounds that could be formed from the following ions: co, Mno,, Fe?*,
Distinguish structures, compositions, and properties of molecular compounds from those of ionic compounds.
If Epsom salt, MgSO4· x H2O, is heated to 250 °C, all the water of hydration is lost. Onheating a 1.687-g sample of the hydrate, 0.824 g of MgSO4 remains. How manymolecules of water occur per formula unit of MgSO4?
A) Chlorophyll molecules are responsible for the green pigmentation of plants. Differing chemically isolated molecular chlorophyll compounds are named as "Chlorophyll X" (where "X" is a variable denoting the actual molecular fragments which are represented by the labels R2, R3, R7, R8, R17). Suppose one molecule of Chlorophyll X contains 4 nitrogen atoms, and Chlorophyll X is 6.26 % nitrogen by weight. Using only this information and the atomic mass of nitrogen, determine the molecular mass of Chlorophyll X. B) The Chlorophyll X molecule contains one magnesium atom. What mass of magnesium is found in 5.17 g of Chlorophyll X compound?
Name each ionic compound: (a) NaHCO 3, the active ingredient in baking soda; (b) Al 2(SO 4) 3, an ingredient once used in antiperspirants but no longer considered effective.
Phosgene, a substance used in poisonous gas warfare during World War I, is so named because it was first prepared by the action of sunlight on a mixture of carbon monoxide and chlorine gases. Its name comes from the Greek words phos (light) and genes (born of). Phosgene has the following elemental composition: 12.14% C, 16.17% O, and 71.69% Cl by mass. Its molar mass is 98.9 g/mol. (d) Using average bond enthalpies, estimate H for the formation of gaseous phosgene from CO(g) and Cl2(g).

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Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Fe2*, Cr**, F¯, 0²- ?