In this week's isolation experiment, assume that 53 mg of pure caffeine is isolated following sublimation of the crude extraction product. If 2.92 g of tea leaves were used, what is the percent by weight of caffeine in the tea leaves? Enter your answer as digits only, no percent sign, using the proper number of significant figures.

Q: The solubility of (NH4)2SO4 in water is 75.4 g of (NH4)2SO4 per 100 g of water. 34.2 g of (NH4)2SO4…

A: Solubility is defined as the maximum amount of solute that is dissolved in 100g of solvent. This…

Q: When performing a gram stain, it is necessary to remove crystal violet stain from any gram negative…

A: Given, Total volume of decolorizer desired = 300 mL

Q: chemist adds 325.0mL of a 1.1 M barium acetate BaC2H3O22 solution to a reaction flask. Calculate…

A: Given:  Molarity of barium acetate = 1.1 M  Volume = 325.0 ml = 0.3250 litres  Molar mass of barium…

Q: 2. The densities of Methane at °C were measured at several pressures with the following results:…

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Q: Your answer is wrong. In addition to checking your math, check that you used the right data and DID…

A:

Q: What volume of titanium isopropoxide is required to form 10 ml of a solution in which it is 0.2 M?…

A:

Q: The number of people present at an outdoor rock concert was estimated by police to be 40,000. What…

A: a)  10,000 If the uncertainty is 10,000, then the low and high value will be as follows: Low…

Q: Properties Observation Color   Odor   Transparency   Specific gravity   pH

A: 1) Colour - Normal urine color ranges from pale yellow to deep amber — the result of a pigment…

Q: Use the lab introduction to answer the following question. When answering this problem, report the…

A: Volume of beverage powder sample mixture = 3.78 L Volume of sample taken for dilution (V1) = 10 mL…

Q: The following image depicts a centrifuge rotor with six sample holders. The blue sample holders…

A: To use a centrifuge rotor, we need to balance it. To balance it - All sample tubes should be evenly…

Q: Not drying the crucible after washing is a bad mistake. For Part B: If the empty crucible is not…

A: Given: The empty crucible is not heated long enough to completely dry it prior to weighing. To…

Q: Which of the following is a proper practice in transferring a certain volume of a liquid reagent…

A: We are to discuss the correct method of transferring liquid from reagent bottle to our own…

Q: If your 12x concentrated stock solution contains 15g of NaCl per liter, how much NaCl would one…

A: Here we have to determine the mass of NaCl present per Litre of working solution if the concentrated…

Q: Ethylene glycol, commonly used as automobile antifreeze, has a specific gravity of 1.1088 at room…

A: Given values, Specific gravity is defined as the density of substance divided by density of water…

Q: An alcohol solution was prepared by adding enough water to 35. 0 mL of the alcohol to make a total…

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Q: It was determined that the average CHEM110 student extracts 1.42 of starch from every 100 g of…

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Q: coffee cup is found to have a volume of  263 mL. Using unit analysis, show what the volume of this…

A: By unit analysis we can conclude that, 1 L = 1000 ml         OR 1000 ml = 1L

Q: If the manufacturer of the vinegar used in the experiment stated that the vinegar contained 5.0%…

A: Given : % CH3COOH in vinegar determined experimentally = 4.8 % And % CH3COOH in vinegar…

Q: 65 g of NaOH in 375 g of NaOH solution Express your answer using two significant figures. AEO Submit…

A: 65 g of NaOH in 375 g of NaOH solution Total mass = 375 + 65 = 440 g  % solute = 65/440 x 100 =…

Q: geologist measures the weight of an ore sample. The weight is  2.2603kg. What is

A: We have to find weight in gram

Q: Determine the amount of potassium chloride in each solution. 18.5 g of a solution containing 1.08…

A: Since, mass%=mass of solutemass of solution×100

Q: The Daily Value for phosphorus is 900 mgmg. How many grams of phosphorus are recommended? Express…

A:

Q: 28 g of KCl and 125 g of H2O Express your answer using two significant figures. ? % Submit Request…

A: Mass percentage for a solute is defined as the mass of solute divided by mass of solution multiplied…

Q: During the experiment, you recover 4.7 mg of Fe by testing 100 mg of powder. Assume a full pill…

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Q: Most common source of copper (Cu) is the mineral Chalcopyrite(CuFeS2). How many kilograms of…

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Q: Calculate the mass % of "S" in CS2. Round-off your answer to two significant figures and enter the…

A: Atomic mass of S = 32.06 g/mol Atomic mass of C= 12.01 g/mol Molecular mass of CS2 = 12.01 +…

Q: A bottle of Cabernet Sauvignon is labeled as having an alcohol content of 12.5% by volume. Use the…

A: Percent of alcohol by volume is calculated from the volume of ethanol present in 100 cm3 of the…

Q: Select all quantities whose values are exact (contains infinite number of significant figures).…

A: A number that showing perfect exactly value  , it contain infinite number of significant figure.

Q: Where does the tip of the thermometer need to be when measuring the boiling point of the unknown…

A: The boiling points are measured at the time when the pressure becomes equal (external pressure =…

Q: An analytical chemist weighs out 0.073 g of an unknown monoprotic acid into a 250 mL volumetric…

A: Given : Mass of monoprotic acid = 0.073 g  Concentration of NaOH = 0.1200 M And volume of NaOH…

Q: Find the limiting factor in the Significant figures of your final calculated value for R. How many…

A: Significant figures are the number of digits used to express a measured or calculated quantity.…

Q: Answer Bank Iron(s) NaCl(s) Sand(s) Naphthalene(s) iron (s) naphthalene (s) sublimation dissolve in…

A: The compounds can be separated from the mixture on the basis of their chemical and physical…

Q: During the experiment, you recover 7.6 mg of Fe by testing 100 mg of powder. Assume a full pill…

A: Given Mass of Fe recovered = 7.6 mg Mass of Fe in 300 mg pill = 27 mg

Q: where did 6.022x10^23 came from in step 2 for this question

A: For the given problem: The number of moles of PbI2 is calculated first. Now, 1 mole = 6.022 x 1023…

Q: A student solving the problem based on the scenario below made an error and the answer is incorrect…

A: Percentage Mass =  mass of solute

Q: Answer Bank Iron(s) NaCl(s) Sand(s) Naphthalene(s) iron (s) naphthalene (s) sublimation dissolve in…

A: The mixture given consist of iron, NaCl, Naphthalene and sand. Since the iron has magnetic…

Q: Which of the following is a best practice in weighing solid samples?   Use weighing paper, a watch…

A: Q. 1 Best practices in weighing solid samples

Q: prepare

A:

Q: You are making growth media for your favorite bacterium. You have 25X LB (the nutrient mixture) and…

A: Solution -

Q: In this experiment, we will be using the gas inside of a small hand-held lighter. Before the trial,…

A: Known Before the trial weight of lighter = 46.747 g After trial weight of lighter = 31.104 g

Q: What is the weight in grams of 8.68x 10^17 CFamolecules? Hint: must use Avogadro's number Put your…

A: Given that : The number of molecules of CF = 8.68x 1017 molecules We have to calculate the weight of…

Q: How many grams are needed to prepare a 5,067 g of CaCl2 of 6 % solution? (Type your answer with the…

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Q: Suppose you performed this experiment and started with 0.480 grams of copper. If you recovered 0.435…

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Q: A bleach disinfecting solution is mixed at a 1:5 ratio (bleach to water). If the solution has 600 mL…

A: In the solution bleach : water = 1:5 Thus for every 1 part of bleach, there are 5 parts of water.

Q: Vhat mass ( in g ) of NaCl is needed to make 590 g of a 11.0% NaCl solu our answer to 2 decimal…

A: Given, Mass of Solution = 590 g  Mass % = 11.0 %

Q: What mass of NaCl to you need to dissolve in order to prepare 2.500 L of 0.325 M solution?

A: Given: Volume of solution = 2.500L Molarity of solution = 0.325M Calculate the moles of solute.…

Q: can you please show me step by step An Extra-strenght asprin tablet contains 0.500 g of the active…

A: Given information:Mass of active ingredient, acetylsalicylic acid = 0.500 g…

Q: An analytical chemist weighs out 0.073 g of an unknown triprotic acid into a 250 mL volumetric flask…

A: Given : Mass of triprotic acid = 0.073 g  Concentration of NaOH = 0.1500 M And volume of NaOH…

Q: n extra-strength aspirin tablet contains 0.250 grams of the active ingredient, acetylsalicylic acid.…

A: Given : 1 grain contains 50 mg of active ingredient  And 1 tablet has 0.250 g of active ingredient…

Analytical Tools

Analytical tools or analysis tools help one to get into a conclusion or results from the data collected. Analytical tools can be applied for simple data sets and also in the case of big data analytics.