lab sample containing sodium chloride, ammonium chloride and sand. It initially weighs 1.893 grams prior to heating. After heating that sample loses 0.262 grams. What is the percentage of ammonium chloride in that initial mixture? Answer with percentage: 52 red balls are mixed with 48 blue balls. What is the percentage of the ball mixture that is made up of red balls?

Q: By weight, liquid A makes up 8 percent of solution R and 18 percent of solution S. If 3 grams of…

A: Percent means per 100. Be it 100ml or g or any other unit.

Q: A student takes a sample of KOH solution and dilutes it to 100.00 mL of water. The student…

A: Dilution of solution can be done by adding water in it and the concentration of original solution…

Q: An infant acetaminophen suspension contains 80 mg/0.80 mL suspension. The recommended dose is 15…

A: Given,Recommended dose is 15 mg/kg body weightAcetaminophen suspension contains 80 mg/0.80 mL

Q: An analytical chemist weighs out 0.029 g of an unknown monoprotic acid into a 250 mL volumetric…

A: Assuming the monoprotic acid is HA. Hence the reaction between the acid and base is  HA + NaOH…

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: Solution 1 Mass of KNO3 9.982 g Volume of Solution 12.5 mL Crystallization temperature 64.1 C…

A: Interpretation: Ksp value for KNO3 is to be calculated Given Data: Mass of KNO3 = 9.982 g  Volume of…

Q: If a certain mixture contains 29.3027% water, how many grams of water are contained in a 12.2576…

A:

Q: How many molecules of cinnamic alcohol are contained in a 0.852−g sample?

A: Number of moles is given by the ratio of mass of the substance by molar mass of the substance.Number…

Q: Which piece of laboratory equipment can make the most precise measurements? Top-loading balance (in…

A: In chemistry laboratory we always prefer an instrument which is having more no. Of measuring units .

Q: A 9.55g sample of a solid was placed in a 15.00mL flask. The remaining volume was filled with…

A: Given,sample of mass solid  Ms=9.55gtotal mass of the (solid +benzene) MT=19.33gmass of benzene MB…

Q: An analytical chemist weighs out 0.120 g of an unknown diprotic acid into a 250 mL volumetric flask…

A: Unknown Diprotic acid = 0.120 gm, its formula will be H2A The reaction of NaOH with H2A

Q: There is one mole of water in the beaker.  A student measured the weight of the 1 mole of water of…

A: Molar mass: The molar mass of an element or compound is defined as the mass of one mole of that…

Q: Before Janet leaves the doctor, she is informed that she needs to pay closer attention to her sodium…

A:

Q: Table 1 Vinegar Sample 1 Vinegar Sample 2 Vinegar Sample 3 Calculations for Sample 1 Mass of 5.00 g…

A: Answer is as follows

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

A:

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: If there are 28.35 grams in each ounce, and each marble weight 0.16 oz. What is the molecular weight…

A: Solution is given below.

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: A tablet of Benadryl (RR), an antihistamine, has a mass of 0.53 g. It contains 25 mg of the active…

A: Given : mass of tablet = 0.53 g And mass of active ingredient = 25 mg

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: Be sure to answer all parts. Fluoridation is the process of adding fluorine compounds to drinking…

A: Amount of water (in grams ) consumed by 50,000 people in an year is determined.1 year = 365 days

Q: If a mixture of seven ingredients contains the following approximate weights, what can you validly…

A: The given weights are: W1 = 26.83 g W2 = 275.3 g W3 = 2.752 g W4 = 4.04 g W5 = 5.197 g W6 = 16.64 g…

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 student obtains a sample of a sand/salt mixture in a test tube. home weighs the test tube with the…

A: The weight consists of two term Sample and test tube .

Q: A 48.0 mLmL sample of 4.3 %%(m/vm/v) NaOHNaOH is diluted with water so that the final volume is…

A: Mass of NaOH before dilution = Mass of NaOH after dilution %(m/v) = 100 x Mass of NaOH/Volume of…

Q: 4. An elixir offerrous sulfate contains 220 mg offerrous sulfate in each 5 ml. ifeach milligram…

A: Given that,  5 mL of an elixir contains = 220 mg ferrous sulphate Each miligram of ferrous sulphate…

Q: A student dissolves a Jefferson nickel to make 100.00 mL of solution in a volumetric flask. The…

A: Mass of Copper in Jefferson nickel used for making the first solution is taken as ‘x’ g.Hence,…

Q: Be sure to answer all parts. Fluoridation is the process of adding fluorine compounds to drinking…

A: One person consumes 140gallon  1 gallon is equal to 3.785L  The density of water = 1g/ml which will…

Q: If you determined the average concentration of vitamin C in the fruit juice to be 0.63 mg/mL, how…

A:

Q: When a glass ware has a marked capacity of 100 mL, does it mean that it has to be filled to the…

A: As we know that capacity is volume of container it has capacity of 100ml so it is not compulsory…

Q: A mixture weighing 1.250g is 20% sodium nitrate, 56.0% silicon dioxide, and the rest is sodium…

A: Given that:  Total Mass of mixture = 1.250 g  Mass percent of sodium nitrate in mixture = 20% Mass…

Q: What is correct from multiple choice

A: Since the error is given constant  Hence by subtracting the error value to the reading we can get…

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: part 1 Which of the following is a best practice in weighing solid samples?   Use weighing paper,…

A: solid  sample  you can weigh it directly on the pan by using paper watchglass . Be sure the balance…

Q: A mixture contains Aluminum Chloride, Sand and Sodium Chloride. Sodium Chloride makes up 22.48% of…

A: Given : Not all the aluminium chloride is sublimed.

Q: A student takes a sample of KOH solution and dilutes it to 100.00 mL of water. The student…

A:

Q: [References] EXERCISE Unit Conversion Drag conversion units onto the boxes in the equation to make…

A:

Q: 5.08 g of benzoic acid are dissolved in 100 mL of hot water (assume all of the benzoic acid…

A: 4.63 g of benzoic acid crystals will be obtained

Q: A metallurgist needs to make 60 kg of architectural bronze, which consist of 12 parts copper, 1 part…

A:

Q: researcher is using 7.20 x 1023 molecules of chlorine gas (Cl2) in an experiment. How many grams of…

A: Number of Molecules = 7.20 ×1023  Moles = Number of molecules/6.022×1023 = 7.20 ×1023/6.022×1023 =…

Q: 9. Wolf teeth cost $28 per kg from Mr. Topango. An average wolf tooth weighs .55ounces. If you give…

A:

Q: 1. The manufacturer of the vinegar used in the experiment stated that the vinegar contained 5.0%…

A: Percentage error is the accepted value minus experimental value devided by accepted value and…

Q: When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 22.8 g of carbon…

A:

Q: Your neighbors are purchasing hamburgers for a backyard barbecue. They are expecting 36 guests and…

A: The problem here will be solved using dimensional analysis.

Q: The formula below is for an oral mixture used to treat pain and infections in the mouth. How many…

A: Given, Volume of Nystain = 60 mL Teaspoonful of doses = 2

Q: NDC 63323-359-03 305903 KANAMYCIN INJECTION, USP *1 g/3 mL (333 mg/mL) For IM or IV Use 3 mL Vial Rx…

A: Answer: 0.90 mL

Q: How many milliliters of 25.0 mg/L stock solution must be added to a 25.00-mL volumetric flask to…

A: Given : Concentration of stock solution = 25.0 mg/L Concentration of final solution to be prepared =…

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: A mother is to give her child 10 ccs of medicine every 6 hours. Unfortunately, she lost the syringe…

A: The number of spoons of medicine to the child per day is to be determined.

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…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".