A solution of FESCN2+ has a concentration of 1.00 x 10-4M and an absorbance of 0.755. What is the concentration of an FeSCN2+ solution with an absotbance of 0.491? Enter your answer in scientific notation, with one decimal place, as follows: 2.3e-4 or 2.3E-4 Do not include units and note that 10 and x are NOT USED in this type of scientific notation. Question 3 of 26

please make sure to enter the correct scientific notation

Six 50.0 ml volumetric flask 1 through 6 are labeled. 10.00 ml of 2.00 x 10-1 M Fe(NO3)3 solution was then pipet into each volumetric flask. A 1.00,2.00,3.00,4.00 and 5.00ml of 2.00 x 10-3M NaSCN solution was then pipetted to flask 2 through 6 respectively. A sufficient amount of 0.10 M nitric acid was then added to each flask to make each a total volume of 50.00ml. Hint M1V1=M2V2 a)what would be the concentration of Fe(NO3)3 in 0.10M HNO3? b)what would be the concentration of NaSCN in 0.10M HNO3?

Please show calculations and work on how to get the conductane values from those ions

© Macmillan Learning Five standard solutions of a newly discovered inorganic salt were used to create a calibration curve. The density (g/mL) of each solution was plotted on the y-axis versus the % (w/v) concentration on the x-axis. The calibration curve was linear and fitted with the following best-fit line. y = 1.17x + 0.188 A student is asked to analyze a solution of this salt with a density of 4.00 g/mL. What is the concentration, in %(w/v), of the unknown salt solution? concentration: % (w/v)

1. a/ Calculate the amount of CCl4 needed to prepare 0, 0.04, 0.08, 0.12, 0.16 and 0.20 M solutions of 25 ml total volume. The density of CCl4 is 1.58 g/ml. b/ Prepare solutions of anthracene containing 4.0 x 10-5 M containing 0.02, 0.04, 0.08, 0.12, 0.16 and 0.20 M carbon tetrachloride

Please help to calculate a dilution factor and the amount of mg in the vitamin. There are 1.13 ppm of iron. An unknown vitamin was dissolved in 25 ml of 6 M of HCl. Then brought up to 100 mL with DI water.  Dilute 5.00 mL of solution A to 100.0 mL in a 100.0-mL volumetric flask. This is Solution B.Transfer 10.00 mL of Solution B to a 100.0-mL volumetric flask.  Based on this dilution, the dilution factor is 200, so how many mg of iron is in vitamin?

How many grams of Ba(103)2 (487 g/mol) can be dissolved in 400 mL of water at 25°C. (Ksp of Ba(1O3)2 = 1.57 x 10-9) Ba(103)2 Ba2+ + 2103 O 0.298 g 0.122 g 0.221 g O 0.926 g O 0.143 g

Be sure to answer all parts. Calculate the concentrations of all the species in a 0.145 M Na,CO3 solution. For H,CO3, Ka1 = 4.2 x 10- and Ka2 = 4.8 × 10-11. [CO,?] =| [Na*] = M M %3D [HCO3 ]=| M [OH] M [H2CO3] = x 10 M [H*] = х 10 M %D (Enter your answer in scientific notation.) (Enter your answer in scientific notation.)

i have hard time geting it stright even after I do the experiment can  u help me with the one pls Material ChemicalsSealed NO2 tubes, KSCN solution (0.002 M), acidified Fe(NO3)3 solution (0.2 M), KSCN crystals, Fe(NO3)3 crystals, KOH (concentrated (8 M)), distilled waterApparatus:Bunsen burner, ring stand, wire gauze, matches, thermometer, dropper, test tubes, glass stirring rod, beaker tongs Procedure Part A: Fill a 600 mL beaker to the 3/4 mark with water. Bring to a boil using a Bunsen burner. In another 600 mL beaker, fill to the 1/2 mark with water; add ice in order to lower the temperature to about 0°C. Note the room temperature. Observe the NO2 thoroughly at room temperature. Place the sealed NO2 tube in the cold bath. Note your observations. Remove the test tube from the cold bath. Let the test tube stand until it reaches room temperature. Note your observations. Place the test tube in the hot bath. Note your observations. Remove the test tube from the hot bath. Let the test…