SITHCCC030 Service Planning Template

1. Determine the maximum mass of aspirin that can be made from the amount of salicylic acid you used. mass (salicylic acid) = 2.004 grams %3D 2. Determine the maximum mass of aspirin that can be made from the volume of acetic anhydride acid you used. Hint: you need the density of acetic anhydride. volume (acetic anhydride) = 4.872 mL 3. Indicate which of the above amounts represents the theoretical yield. 4. Find the actual amount of aspirin produced from the following data: mass aspirin and crucible = 3.216 g 0.942 g mass empty crucible = 5. Calculate the percent yield of your aspirin.

when drawing melting point composition diagram for a mixture of something such as cinnamic acid and urea comparing melting point vs composition for organic chemistry, if i have three different compositions (1:4, 4:1,1:1) should i have 3 different graphs or would this all be on the same graph? and how do i convert grams to moles for example for composition 1:4 my data was 0.8003 g : 3.1917 g?

Q) A student misreads the directions and adds 4.0 g of benzoic acid instead of 0.4 g. What do you expect to happen? Would the experiment still be valid? Explain your reasoning.     Pure Lauric Acid Lauric Acid + 0.4 g Benzoic Acid Lauric Acid + 0.5 g Benzoic Acid Mass of Lauric Acid   3.03g 3.00g 3.00g Mass of Benzoic Acid   0 g 0.40g 0.50g Freezing Point   43’C 39’C 38’C Freezing Point Depression *   4’C 5’C Molality of Benzoic Acid in Lauric Acid*   1.026 mol/kg 1.282 mol/kg Moles of Benzoic Acid *   0.003 moles 0.004 moles Experimental Molar Mass of Benzoic Acid *   133.3g/mol 125 g/mol Average Molar Mass *   129.15g/mol   Percent Error *   5.75%

pour it 2. Still sleepy from a late night studying, you take the milk out of the refrigerator and pour it on your lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation for the fact of coagulated milk onto your cereal. The last time you saw milk coagulate like that was when you added breakfast cereal. Unfortunately, by the time you notice the funny smell you have already poured clumps lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation foea added that spoiled milk coagulates.

A pharmacist wants to use three lots of zinc oxide ointment containing, respectfully, 40%, 30%, and 10% of zinc oxide. In what proportion should they be mixed to prepare a 20% zinc oxide ointment? A) 1:1:5 B) 1:3:4 C) 1:1:3 D) 1:3:1

Your 50 mL beaker has a mass of 6.65 g. You add 10.00 mL to the 50 mL beaker and now the total mass is 17.45 g. You originally used 5.14 g of NaCl to make the solution. What is the percent composition of your solution? These calculations are described in the lab procedure in detail.

A cough syrup has a density of 1.20 g/mL. A doctor orders 48.0 g of the syrup for a sick child. How many teaspoons (tsp) will you administer to the child? (1 tsp = 5.0 mL). 1) 6.4 tsp 2) 8 tsp 3) 4 tsp 4) 5 tsp

duction to MasteringChemistry - Attempt 1 duction to Vocabulary Questions Reset Help maple 1. Hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as pine cedar elm and pine mango 2. Conifer leaves are generally thin and needle-like, while seeds are contained in cones. Conifers cedar include pine and elm elm 3. Deciduous trees lose their leaves seasonally and include trees such as mango and maple 4. Evergreens are plants that maintain their leaves in all seasons and include trees such as elm pine and cedar Submit Previous Answers Request Answer Introduction to Ma. fa トト」 トI fo fo ins prt sc 8% 8 9 10

%24 4+ dl w/ b. Be sure to answer all parts. How many moles are contained in each number of grams of table sugar (C12H22011, molar mass 342.3 g/mol)? Enter your answer in scientific notation. a. 55.0 g b. 0.0250 g x 10 mol x 10 IIO %23 2 3. 5. 9- 8. 4

You have a sample of soil. Soil is a heterogeneous mixture. You separate the different size components from the soil using wire sieves. You found the following components in your soil: • 28 grams of clay ● 14 grams of silt • 24 grams of sand • 8 grams of gravel • 10 grams of decayed plant material. Determine the mass percent of the different components in your soil sample. 24. Clay 25. Silt 26. Sand 27. Gravel 28. Decayed plants LIVEWORKSHEETS

Example 60 mice, each weighing 2 kg, were used in a lethal dose (LD50) experiment. The number of death mice versus the mass of substance A given to each mouse presented in the Figure below. 70 60 E S0 40 30 ultann A E 20 10 10 15 20 29 30 35 40 Mass of Sulstance given to each mouse (mg) Calculate the lethal dose (LD50) of substance A and B seperately. • Which one of the substances is more toxic? Number of death mice

4. Two engineers are serving as trainees in a laboratory of a pharmaceutical company. One of their tasks involves determining the identity of a vitamin they were given by using any equipment or method at their disposal. As a hint, their supervisor gave them a list of possible candidates for the vitamins identity which includes: Vitamin Molecular Formula Folinic Acid C20 H23 N707 C3H11NO3 C,H,N20 C17H20N406 Pyridoxine Niacinamide Riboflavin To identify the vitamins identity, the two trainees separated their sample into two equal portions and performed two separate tests: [a.] Engr. Mayo used the flame atomic absorption spectrophotometer in order to identify the elemental composition of the sample which happens to be 59.0% C, 5.0% H and 22.9% N by mass [b.] Engr. Busog on the other hand mixed his 3.88 g sample with 30.0 mL of nitrobenzene, C,H5NO2 (Latent Heat of Fusion = 79.81 J/g). Using Beckmann's method, he determined the freezing point depression to be 7.1 deg C. Based on the tests…

Using the given information Mass CuCl2 . 2H2O = (2.20x10^0) g Mass Aluminum = (1.800x10^-1) g Volume of water = (8.600x10^1) mL ** Project info is not NECESSARY ! If you know chemistry then just answer the question or give it to someone who does Use the values generated by this question to calculate the theoretical yield of copper in grams. Input the answer in this quiz to three significant figures and in scientific notation to check your answers. In scientific notation please

Zinc (Zn) Zn Copper (Cu) 9.59 g mass The ammeter completed the run time for this experiment. Record the final mass values for each electrode in your notes. Click the RERUN button on the ammeter to readjust the ammeter settings and run another experiment without changing the electrode metals. 10.41 g mass Click the RESET button on the ammeter to start a new experiment. Macroscopic View Zn(NO3)2 (aq) Calculate the moles of Zinc deposited. moles Submit Answer format: Number: Round to: 5 decimal places. Show work RERUN O RESET O OFF ON 6.00 VOLTS 02.00 00:00 AMPS TIMER (MIN) DC Ammeter Standard Reduction Potentials (Eº)

Choose the one correct or one incorrect statement regarding the technique of weighing by difference:      the weighing beaker should be moved with a strip of paper used as a handle or strap      preparing 4 samples requires only 4 weighings      the balance should be tared after each sample is removed from the weighing beaker      the weighing beaker must be clean but does not need to be dry      the receiving flasks must be both clean and dry before weighing begins

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 7 pieces of 0.97 cm diameter and 1.14 cm height cylindrical beads is determined to be 1.63 g/mL. These beads were then placed in a flask and was filled to the 40 mL mark with a salt solution. The total weight measured of the beads and the salt solution was 46.86 g. Upon further inspection, it was found that manufacturing defects caused the measured porosity of the beads to be at 32%. 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.

Using the following equation and your result from Step 30, determine % concentration (mass percent) of acetic acid (CH3COOH) in the vinegar and record it in Data Table 2. Note: The density of vinegar is 1.00 g/ml and the molecular mass of CH3COOH is 60.05 g/mol. % CH3COOH=mol CH3COOH1 L vinegar×1 L1000 mL×1 mL vinegar1.006 g vinegar×60.05 g CH3COOH1 mol CH3COOH×100%

Hi! I am having difficulty finishing and finding out the rest of tables in excel. I am trying to find the Calcium Carbonate in an Eggshell. I have put up the excel sheet I have done with the given data already inputed, I just need to find out the rest. Thank you so much!

Consider an iron bar on a balance weights 75.0g.   As the iron bar rusts, which of the following is true? Explain your answer.   The balance will read less than 75.0 g. The balance will read 75.0 g. The balance will read greater than 75.0 g. The balance will read greater than 75.0 g, but if the bar is removed, the rust is scraped off, and the bar replaced, the balance will read 75.0 g.

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

This lab used 6 M HCl that was diluted from a higher concentration.  If your lab instructor asked you to make a solution of HCl with a concentration of 2.0 M from 50.0 mL of a 10.0 M stock solution of HCl, to what total volume would you have to dilute the portion of stock solution?  Units as mL.

An acid, HEl, is formed from a hypothetical element, El, and a subsequent aqueous solution is created with the acid and water. The solution is measured to be 22.49% HEl by weight. Calculate the mol % of the acid in the solution.   Atomic Mass: H: 1.00784 g/mol O: 15.999 g/mol El: 142.76243 g/mol   Round your answer to 2 decimal places.

Fill in the Blanks Chemical Price/kg (in dollars) NaOH 21.17 CaCl2 41.28 КОН 31.38 CUSO4 93.32 NH4NO3 59.64 NH4CI 25.04 NaCl 21.15 NaNO3 72.35 Type your answers in all of the blanks and submit Another requirement is that the cost of the salt needs to be evaluated to determine if it is economical to use. To do this, you should consider the price per degree of dropping the temperature of the solution. The table of prices per kg for each salt is shown above. Let's determine the cost for the NaOH solid as an example. We want to determine how much it costs to change the temperature by 1 deg C so we start with the cost given in the table and end with $/deg C. For NaOH: 21.17 $/ 1 kg) X ( 1 kg/ 1000 X ( Type your answer here g/ Type your answer here deg C) Please type your answer to submit Please type your answer to submit Type your answer here $/deg C

An aqueous solution was created by placing 0.018 g of NaCl into a 50 mL volumetric flask and diluting to volume with deionized water. (Because the amount of solute is small, you may assume that the volume & density of the solution is equal to the volume & density of the solvent where appropriate.) Find the concentration in terms of the following units.  Report your answers without scientific notation. Only input numbers. Your answers must be expressed to the correct number of significant figures. Any values less than one must have a zero in front of the decimal (e.g. 0.01 not .01) Molarity: M Molality: m Mole Fraction of NaCl (X): Mass % of NaCl: %

A 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. Explain the type of error they are incurring in their experiment.

Students react zinc with hydrochloric acid to produce zinc chloride and hydrogen gas in a test tube. They weighed the reactants, the flask, and the balloon that captured the hydrogen gas. The zinc was added to the acid and the balloon attached across the mouth of the flask. The table shows the data each group collected. Zinc Zinc & Chloride Hydrochloric & |Group acid Hydrogen gas 155.67 g 155.65 g 2 157.80 g 157.78 g 3 148.22 g 146.54 g 4 155.93 g 155.92 g 169.42 g 169.43 g Explain how the data supports the Law of Conservation of Mass is followed.

Data obtained: Chips # of extractions Chips' weight (g) Fat weight (g) Regular  3 20.043 6.745   3 20.187 6.438   3 20.198 7.451 Low fat  3 19.456 3.982   3 20.072 4.547   3 20.192 4.589   Mass percent is a method of expressing the concentration of a substance in a mixture or element in a compound. It is calculated as the mass of the component divided by the total mass of the mixture and then multiplied by 100 to get the percent. The formula is: mass % of component= (mass of component / total mass) x 100%   1) Reproduce the following table, and use the data to determine the mass % of fat in the chips for each trial. 2) Show one example calculation. Chips Trial % by mass of fat Regular 1     2     3   Lowfat 1     2     3