In the lab you measure a clean, dry, crucible & cover to be 24.36 grams. You obtain a 2 cm piece of pure magnesium metal. After polishing the magnesium, you place it into your crucible and together the mass of the crucible, cover and magnesium was determined to be 24.66 grams. You observe that the magnesium is gray and shiny. You heat the crucible gently at first then vigorous for 10 minutes until the magnesium ignites. After the crucible cools you add a few drops of distilled water and heat again. The mass of the magnesium compound, crucible, and cover was determined to be 24.85 grams.  Determine the empirical formula of the compound. Show all work & units. The empirical formula can be determined via stepwise calculation of the quantities below. Mass of the Mg Mass of the MgO Mass of O Moles of Mg & Moles of O: Molar ratio of Mg/O: Empirical formula of compound, MgxOy

Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 13 pieces of 0.6 cm diameter and 0.67 cm height cylindrical beads is determined to be 1.53 g/mL. These beads were then placed in a flask and was filled to the 42 mL mark with a salt solution. The total weight measured of the beads and the salt solution was 51.68 g. Upon further inspection, it was found that manufacturing defects caused the measured porosity of the beads to be at 21%. Assuming that the solution was able to fully fill the empty spaces inside the beads, calculate the density of the salt solution. Show your solutions in the next item Round your answer to 2 decimal places. Add your answer

Please, I want to answer this question. Likewise every method with its explanation and clarification in an extensive manner.... It is preferable to calligraphy on a computer

To standardize the sodium thiosulfate solution in the iodometric determination of copper, 2.29 grams of potassium iodate (KIO3; MW=214 g/mol) was dissolved in a 100.0 mL volumetric flask. What is concentration of the KIO3 solution? NOTE! Report your answer in scientific notation to 2 decimal places. Type your answer in a format similar to this example --> 3.21*10^-4. Type your answer...

For the gravimetric determination of manganese, 1.8762 g of sample containing Mn was dissolved in acid solution and made up to 100 mL in a calibrated volumetric flask. A 25.00 mL aliquot of this solution was transferred to a beaker. The solution was heated to boiling and chemical substances required were added till precipitating MnNH4PO4. After filtering, rinsing, and igniting, 0.5365 g of Mn2P2O7 was obtained. Calculate the % manganese in the sample (Mn: 55, P: 31, O: 16 g/mol).

What are the  a.) source (natural)synthetic of raw materials b.) method of separation/chemical reaction (with brief process)   of the raw materials: calcium polysulphide and hydrochloride acid with yield of precipitated sulfur? As also shown in the attached image

A prospector wants to know how much gold is in the ore that he has been mining.  A sample weighing 11.2456 grams is dissolved in Aqua Regia (a mixture of HCl and HNO3).  That sample is then transferred to a 200.00 mL volumetric flask and diluted to the mark with water.  This is called solution 1.  A volumetric pipet is used to transfer 10.00 mL of solution 1 to a second 500.00 mL volumetric flask.  The second flask is filled to the mark resulting in solution 2.  5.00 mL of solution 2 is analyzed and found to contain 13.45 ppm Au.  Answer each of the questions below. 1. What is the concentration of Au in solution 1.  The units should be ppm 2. How many micrograms of Au are in the 5.00 mL sample that was measured?   3. How many micrograms of gold were in the 500.00 mL flask containing solution 2. 4. How many grams Au were in the flask containing solution 1 5. What is the %Au in the original sample?

1

A pipet is used to transfer 5.00 mL of a 1.25 M stock solution in flask "S" to a 25.00-mL volumetric flask "B," which is then diluted with DI H,0 to the calibration mark. The solution is thoroughly mixed. Next, 2.00 mL of the solution in volumetric flask "A" is transferred by pipet to a 50.00-mL volumetric flask "B" and then diluted with DI H,0 to the calibration mark. Calculate the molarity of the solution in vol- umetric flask “B."

How many grams of Mn3O4 can be obtained from 1.00 g MnO2? how many ounces of Mn3O4 can be obtained from1.00 lb  MnO2?  Whatwt of Mn ore should  be taken so that the percentage of MnO2 in the ore can be found by multiplying by 5 to the number of centigrams og Mn3O4