Question

6. In a particular kind of steel (one of the Standard 300 series austentic grades, for you steel-heads), the composition by mass is roughly 0.15% C, 1.00% Si, 2.00% Mn, 0.045% P, 0.030% S, 17.00% Cr, 7.00% Ni, and the rest Fe. What is the ratio of iron atoms to carbon atoms in this steel? Please use integer numbers for your ratio (for example, 7:4.) 7. Salts-ionic compounds-also exist in solid form, and ionic charges hold them together. (That should trigger some Coulomb's Law flashbacks...) Based on this, rank the melting points-1 for the lowest melting point to 5 for the highest melting point--for the substances below. Remember to consider both the magnitude and the distance separating (i.e., size of) the ions. NaCl RbBr NaBr KBr Propose a chloride salt with chemical formula XCl that has a higher melting point than any of these. In a sentence or two, explain your choice. Propose a rubidium salt with chemical formula RbX that has a lower melting point than any of these. In a sentence or two, explain your choice.

Answer 1

9n ithe yinut uution, the deel Contains Phaphores 0.045 1 Canson 0.151. 0.03 1. Silicon 100 1 2.001. Chromium 1.001. Nickel a.00 1 Mangame se Lamd ithu hert in 9ren (Fe) Jhus, cthe caf Fe cin iths sampl leet in (100 - 0.15 -1.00 -2.00-0 .04s-0.030 -/7.00 -7.09)7 7 2. 775 . No. ratie af fe to carlion is 72.775 485.16669 1 0.15 455.1669 1 (Fe:c)

Answer 7 :- for the given salts in the question the melting points in the increasing order are 1. KI 2. RbBr 3. KBr 4. NaBr 5. NaCl.