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- To what volume should you dilute 46.0 mLmL of a 13 molL−1molL−1 stock HNO3HNO3 solution to obtain a 0.129 molL−1molL−1 HNO3HNO3 solution? Express your answer using two significant figures. Help please!1. What is the numerical value of the concentration in a solution that gave an instrument readout of 53.9 when the proportionality constant is 104.8?A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g /mL. Calculate the % by weight of CaCl2 in the solution described above. Group of answer choices .0594 .0632 6.32 5.94
- Make a dilution series to get to 1:100. Start with making 1:10 dilution by adding 1mL of sample and 9mL of diluent, now continue the series to get to 1:100A group of students is doing an analysis of copper in a 1-peso coin. They were tasked to prepare standard solutions and weigh the analyte as the end-product of their experiment. What type of error is it and explain how this type of error incurring in their experiment. a. Makisig forgot to calibrate the analytical balance before weighing. b. Only one trial was performed in the experiment. c. One member inadvertently recorded 29.90 mL instead of 19.90 mL volume. d. Marikit had very good precision but poor accuracy in her data.e. Volumetric flasks were placed inside the oven for drying before it was used.f. Trial 1 and 2 have values close to 30.0 mL while trial 3 gave 55.0 mL.g. The reagent used in determining copper was added incorrectly and gave a low yield.Calculate the volume of liquid in the round flask sketched below. Give your answer in milliliters, and round to the nearest 0.1mL
- How many milliliters of 2.5 M sulfuric acid are needed to make 100.0 mL of 0.40 M H 2SO 4? 16.0 mL 39.3 mL 0.0160 mL 0.0625 mL 62.5 mLA solution is made using 250.0 mL of ethanol (density 0.7892 g/mL) and 369.1 mL of water (density 1.000 g/mL). What is the mass percent of the ethanol?400mg of penicillin is to be given IV. One hand is penicillin 600mg in 2 ml. What volumes should be drawn up?
- For questions 48-55, please refer to the following: In order to form Ba(IO3)2, 500 mL of 0.5000 M Ba(NO3)2 was mixed with 500 mL of 0.0500 M NaIO3. Ksp= 1.57x10^-9 1. How many millimoles of Ba(NO3)2 are there in the solution? 2. How many millimoles of NaIO3 are there in the solution?Mass of Compound A 100 MLA volume of 25.00 mL of the original solution was diluted to a total volume of 100.0 mL and then 10.00 mL of that diluted solution was diluted to a total volume of 15.00 mL to make the sample for analysis. If a student in lab found that the solution for spectroscopic analysis had a concentration of (4.0x10^-5) M, what was the concentration of the original solution, in units of M?