Whilst working in the pharmacy aseptic unit you are asked to prepare 5 litres of a solution containing potassium ions 1 mmol/mL. What weight of potassium chloride is required? (atomic weight of potassium = 39: atomic weight of chlorine = 35.5) Units - g

Q: A laboratory procedure calls for making 400.0 mL of a 1.1 mol L' NANO3 solution. Part A What mass of…

A: Out of multiple methods available to represent the concentration of a particular solution, one…

Q: Electrical energy is usually measured in kilowatt-hours, kWh. A Watt is 1 joule per second. A…

A: Ans.    1 Cal = 4.184 joules   776 Cal =776×4.184 joules                =3246.784 joules      Now…

Q: 2. As part of the process in the production of a perfume, a certain substance with water is…

A: It follows first order kinetics.  So, ln(a0/at) = kt  Or, k = (1/t)ln(a0/at) .....(1)  Here, a0 = 75…

Q: A chemist prepares a solution of aluminum sulfite (Al, (SO,).) by measuring out 1.5 × 10“ umol of…

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Q: Q5: 1.44 grams of a sample of marble (impure calcium carbonate) dissolved in 40 ml of 1.0 normality…

A: Initial concentration of acid (M) = 1.0 M Initial volume of acid (M) = 0.04 L Initial number of…

Q: What is the mass of a golf ball traveling at 82.0 ms 1? The rest mass of a golf ball is 45.9 g, as…

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Q: A chemistry student weighs out 45. g of an unknown solid compound X and adds it to 750. mL of disti…

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Q: 11) Sn,S, is written as SnS, instead by dividing by the common factor of 2 terli ens O

A:

Q: Example :-A solution contains 3.30 gm of Na2CO3.10H2O in each 15 ml. What is its molarity? What is…

A: The concentration of a solution can be expressed as the molarity, (w/v)%, (v/v)%, molality or…

Q: A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92…

A: Given : Mass of NaCl : 7.7g Weight/Volume = 0.92 To calculate: volume of the saline solution.

Q: 2. The Anemovax COVID-19 vaccine uses 0.950% (w/v) NaCl (normal saline, preservative- free) as its…

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Q: An 8-fluid ounce [fl oz] glass of milk contains 305 milligrams [mg] of calcium. The molecular weight…

A: Molarity: Molarity can be defined by saying that the number of moles of the solute dissolved per…

Q: The quantitative significance of “take a deep breath" varies, of course, with the individual. When…

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Q: A solution of 20.91 % by weight H2SO4 has a specific gravity of 1.150. What is the normality of this…

A: Answer-1 Specific gravity is the ratio of density of a substance with the density of water. Since,…

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

A: Given that 9.55 g sample of solid was placed in 15.00 mL flask and remaining volume was filled with…

Q: Since the pandemic has hit, more people are growing their own gardens and processing the fruits of…

A: Each quart jar requires = 6.05g alum So, 50 quart jars would require = 6.05*50 g = 302.5g alum %…

Q: Will 260 milligrams of calcium carbonate raise the pH of 75.0 milliliters of stomach fluid from a…

A: Calcium carbonate is CaCO3 which is a diacidic base. The balanced equation for the neutralization…

Q: A 0.2121-g sample of pure NazC,O, (134.00 g/mol) was titrated with 43.31 mL of KMNO4. What is the…

A: Given, mass of Na2C2O4 =0.2121 g moles of Na2C2O4 =0.2121 g132 g/mol=1.58 ×10-3 mol Volume of KMnO4=…

Q: The mass in milligrams of oxygen (molar mass= 16 g/mol) in 1920cm3 of 1.76X10-3 M solution of H3PO4…

A: H3PO4 Volume = 1920 cm³ = 1920 mL = 1.920 L Molarity = 1.76 × 10-³ M =1.76 × 10-³ mol/L   Molarity =…

Q: A patient is treated with hydroxychloroquine for malaria. The drug is given based on the body mass…

A: Given, A patient is treated with hydroxychloroquine for malaria. The drug is given based on the body…

Q: An analytical chemist weighs out 0.278 g of an unknown diprotic acid into a 250 mL volumetric flask…

A: Given-> Weight of diprotic acid = 0.278 gm Volume of flask= 250 ml = 0.250 L (1 L = 1000 ml)…

Q: A solution of 20.91% by weight H;SO, has a specific gravity of 1.150. What is the normality of this…

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Q: Lipitor, a pharmaceutical drug that has been shown to lower "bad" cholesterol levels while raising…

A: Given,2.0g pill contains 7.5% of the active ingredient by mass.Then,25 pills contains = ?

Q: A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration…

A: It is given that,       Initial concentration of salt dissolved in        Lake…

Q: Whilst working in the pharmacy aseptic unit you are asked to prepare 5 litres of a solution…

A: Molarity will be constant through out the solution any time.

Q: What is the maximum amount of silver in grams that can be plated out of 4.8 Lof an AGNO, solution…

A: Given volume of solution = 4.8 L density of solution = 1.01 g/ml

Q: The solubility of benzic acid in water at room temperature is 0.38 g per 100 ml of water. If 4.62 g…

A: When benzoic acid is dissolved in 100 ml of hot water (assume all the benzoic acid dissolves) and…

Q: what is the mass of calcium carbonate reacted?

A: Given, Mass of marble before reaction 3.0g Mass of marble after reaction 1.8g

Q: A solution is made by mixing 5.40 g of toluene, CHg(1), with 954. mL of chloroform, CHCI3(1).…

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Q: Knowing that 1 calorie = 4.184 joules and 1kWh = 3.6 x 106 Joules, convert the following: 2739…

A: Given: 1 calorie = 4.184 joules 1kWh = 3.6 x 106 Joules Toconvert: 2739 teraWh into nanocalories.

Q: Density = (0.9M x 36.46g/mol)/36              = 32.814/36              = 0.9115g/mL My problem is…

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Q: An infant with heart problems is given a prescription of 35mcg. The nurse calculates the desired…

A: Required amount is 35 mcg. Available Concentration of medicine = 0.05mg/ml.

Q: How many milliliters of 18.0 M H2SO4 are required to prepare 35.0 mL of 0.250 M solution?  Report…

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Q: What mass of  NaHCO3  would he need to ingest to neutralize this much  HCl

A: Molarity = number of moles/volume of solution (in L)  number of moles = mass/molar mass

Q: 1.4L of a 2.50 M HNO, solution is added to water so that the final volume is 5.0L Express your…

A: Given: Molarity of HNO3 solution = 2.50 M             Volume of HNO3 solution = 1.4 L       On…

Q: Electrical energy is measured in kilowatt hours, kWH. A watt is 1 joule per second, a kilowatt is…

A: Killowatt hour is an unit of energy . Energy has another unit, calorie.  Different units can be…

Q: The mass in milligrams of oxygen (molar mass= 16 g/mol) in 1920 cm³ of 1.76X10-3 M solution of…

A:

Q: 4. The school districts throughout ND are paid foundation aid by the State for you to go to school.…

A: The amount paid per year = $ 10,036 / year.

Q: A 15.6-g sample of sodium carbonate is added to a solution of acetic acid weighing 19.7 g. The two…

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Q: Phenobarbital was introduced in 1912 for the treatment of epilepsy. It is an anti-convulsant and…

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Q: A sample of freshly precipitated and filtered silver chloride weighs 459.0 mg. If 1.00% of the…

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Q: The mass in milligrams of oxygen (molar mass= 16 g/mol) in 1920 cm3 of 1.76X10-3 M solution of…

A: To calculate this question first of all we have to calculate the moles of H2Cr2O7 used.  As we know…

Q: An analytical chemist weighs out 0.159 g of an unknown monoprotic acid into a 250 mL volumetric…

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Q: A construction team gives an estimate of three months to repave a large stretch of a very busy road…

A: In chemistry there are many ways to check the deviation of experimental data from the accurate…

Q: A solution of 20.91 % by weight H2SO4 has a specific gravity of 1.150. What is the normality of this…

A: We have to find normality of solution

Q: Price the Prescription using the Professional Fee method. Rx Potassium chloride 40 mEq NaCl 30 mEq…

A: The professional fee is ₱35.00. The mass of KCl and NaCl in each mEq is 0.075 g and 0.058 g,…

Q: A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration…

A: Given: Concentration of salt dissolved in Lake Parsons = 28.44 g/L Average concentration of salt in…

Q: A chemist adds 165.0 mL of a 0.0395 mmol/L copper(II) sulfate (CuSO, solution to a reaction flask.…

A: Molar mass of Cu(II)SO4 is 159.61 g/mol

Q: A chemist adds 450.0 mL of a 1.0 mol/L barium acetate (Ba (C,H,0,),) solution to a reaction flask.…

A: Volume of solution = 450.0 ml  ...Or  because 1L = 1000 ml    ....so, 450.0 ml × (1L / 1000 ml ) =…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.