6. The density of sodium chloride is 2.165 g/cm³. Using only the density and crystal structure, calculate the distance between Na and CI atoms in the structure.

Using the following thermodynamic data, calculate the lattice enthalpy of lithium oxide: Li(g) → Li*(g) + e* AH₁= 540 kJ /mol Li(s) → Li(g) AHS= +146 kJ/mol O₂(s) → 20(g) AH₂= +488 kJ /mol O(g) + 1e →→ O(g) AHA1= -142 kJ /mol O` (g) + 1e¯ → 0²-(g) AHÃ₂= +844 kJ /mol 2Li(s) + 1/2O₂(g) → Li₂O(s) AH₁= -586 kJ /mol NOTE: Give your answer in kJ mol-¹

Hi, can someone pls tell me if these answers are correct and help me find the answers to the ones I didn't know, thanks ?

6. The density of sodium chloride is 2.165 g/cm³. Using only the density and crystal structure, calculate the distance between Na and Cl atoms in the structure. 7 TL 1 ef. D-21 U DEN 1.1.-1 TI..

How  could you separate tellurium dioxide, TeO2 from SiO2

A 3.00- g sample of an alloy of Pb Lead was dissolved in nitric acid (HNO3). Sulfuric acid was added to this solution, which precipitated 1.69 g of lead sulfate (PbSO4). What is the percentage of lead (Pb) in the sample? (Given the atomic mass of Pb = 207 , S =32, O = 16 )

On the basis of ionic charge and ionic radii given in Table 1, predict crystal structures for the following materials: a. Cao (b) MnS (c) KBr (d) CsBr b. Justify your selections. Table 1: Ionic Radii for Several Cations and Anions Ionic Radius (nm) Jonic Radias (am) Cation Anion AP 0.053 Br 0.196 Bu 0.136 0.181 0.100 0.133 Cs' 0.170 0.220 Fel Fe K' 0.077 0.140 0.069 0.184 0.138 Mg Mn. 0.072 0.067 Na 0.102 0.069 0.040 0.061

Write the following equations for Al2(SO4)3(aq) and Pb(NO3)2(aq). Include the states of matter in the reactions.

how many grams of lithium nitrate will be needed to make 250 grams of lithium sulfate. assuming that you have an adequate amount of lead (IV) sulfate to do the reaction?

In 1774, C. Scheele obtained a gas by reacting pyrolusite (MnO2) with sulfuric acid. The gas, which had been obtained that same year by Joseph Priestley by a different method, was an element, A. (a) What is the element isolated by Scheele and Priestley? (b) Element A combines with almost all other elements. For example, with cesium it gives a compound in which the mass percent of A is 19.39%. The element combines with hydrogen to give a compound with a mass percent of element A of 94.12%. Determine the formulas of the cesium and hydrogen compounds. (c) The compounds of cesium and hydrogen with element A react with one another. Write a balanced equation for the reaction.