Why does the test for the presence of potassium involve a flame test?

24. How do you set up and solve mass percent problems like this based off absorbance?

7 If you put an acid in water it will produce ions whereas a base dissolved in water will produce ions.

Use the References to access important values if needed for this question. 1A H2A Li Be Na Mg 3B 4B 5B 6B 7B K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga 8B 3A 4A 5A 6A 7A He BCN 0 F Ne 1B 2B Al Si P S Cl Ar Ge As Se Br Kr Sn Sb Te I Xe 8A Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn **** Fr Ra Ac Rf Ha Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Considering only ions with charges of +1, +2, -1 and -2, or neutral atoms, give the symbols for 4 species that are isoelectronic with the bromide ion, Br".

In a Spec-20 experiment a student took 4.3178g of an unknown material containing cobalt and dissolved it in 250.00 ml of water. The student determined the concentration of the solution to be 0.075M in cobalt. What was the mass percent cobalt in the original unknown?

Give correct detailed Solution with explanation needed...don't give Handwritten answer..don't copy answer anywhere

does Melted (potassium chlorate) & Melted (silver chloride) conducts electricity? and why?

A student is given a 1.3308 g of an unknown copper compound. Following isolation by displacement by Mg, 0.5830 g of Cu metal is recovered. What is the percentage of Cu in the sample? You may assume that one mole of the sample contains one mole of copper.

Ca* OH OH Ca* Ca* Ca* OH OH OH Ca* OH OH Ca OH OH Ca** OH Ca* 2+ Ca(OH) OH Саон A C Which beaker best depicts calcium hydroxide in a beaker of water? ов O A O D O E

Volume of water sample used:  103 mL Initial buret volume:  0.45 mL Final buret volume:  16.92 mL HCl molarity:  0.020 M How many moles of HCl were used in this titration?