A dialysis unit requires 78.5 L of water. What is the estimated digit? 7 8 5 None are estimated. It is an exact number.

Q: A chemist needs to know the mass of a sample of Na, SO, to 4 significant digits. She puts the sample…

A: The significant figures (also known as the significant digits or precision) of a number written in…

Q: The nurse notes that a patient is to receive 22mg topical ointment applied daily. The pharmacy sends…

A: Given, dose of ointment required = 22 mg            in 2.54 cm, ointment that can be applied = 15 mg

Q: A laboratory procedure calls for making 390.0 mL of a 1.3 M NaNO3 solution. What mass of NaNO3 (in…

A:

Q: A small beaker was found to have a mass of 27.847 g. A 10.00 mL sample of an unknown liquidwas…

A: Answer :- 1.225 (g.mL-1)  Density of unknown liquid (solution) = 1.225 g.mL-1…

Q: A chemist makes 780. ml. of mercury(I) iodide (Hgl.) working solution by adding distilled water to…

A: We have 780 mL of working solution, stock solution as 230 mL 48.7 *10-6M. We have to calculate the…

Q: A chemist makes 390. mL of silver(II) oxide (Ago) working solution by adding distilled water to 90.0…

A: Volume of solution (V1) = 390 ml Concentration (C1) = to find Volume (V2) = 90.0 ml Concentration…

Q: A chemist makes 340. mL of iron(II) bromide (FeBr₂) working solution by adding distilled water to…

A:

Q: 4| Automobile batteries contain sulfuric acid, H,SO4, commonly called "battery acid". This is a…

A: Given : Volume of battery acid = 1.00 gallon  Density of solution = 1.28 g/mL Mass percent of H2SO4…

Q: A 82.0 kg patient being treated for a peritoneal B. fragilis infection is to receive an IV infusion…

A:

Q: The doctor prescribes a medicine that will be given 3 units for 12 hours, the concentration of the…

A: Calculate the volume of medicine from the given concentration of medicine.

Q: A chemistry student needs 40.0 g of butanoic acid for an experiment. She has available 1.0 kg of a…

A: Mass of butanoic acid needed = 40.0 g6.37% w/w butanoic acid solutionThis means that 63.7 g of…

Q: A physician orders 3 grains Phenobarbital at bedtime for control of seizures for Mr. I. The…

A: Given that,  A physician orders 3 grains of phenobarbital.  Mass of phenobarbital in a tablet = 60…

Q: A chemistry student needs 25.0 g of acetone for an experiment. He has available 1.2 kg of a 21.2%…

A: Mass of acetone needed = 25.0 g21.2 % w/w butanoic acid solutionThis means that 21.2 g of acetone is…

Q: A chemist must prepare 650. mL of 81.0 µM aqueous zinc oxalate (ZnC,0,) working solution. She'll do…

A:

Q: Convert 3.09 x 10^-3 m to the equivalent length in nanometers 3.09 x 10^-3 m =

A: In this question, we will Converted m to nm unit  You can see details Solution below.

Q: In the lab you weigh 12.54 g of NaCl how much water do you need to dissolve the NaCl and make a…

A: Number of moles of NaCl can be calculated as:

Q: A doctor orders 2.35g of a medication. It comes as a suspension of 600. mg/mL. How many mL need to…

A: The mass of the medicine is 2.35 g Since, 1g = 1000 mg Therefore, mass of medicine in mg = 2.35×1000…

Q: A patient with ovarian carcinoma is prescribed intravenous Taxol, at a recommended dosage of 175.0…

A:

Q: föllówing data was collected from a solution that was prepared to allow a sample of plastic to…

A: The mass v/s density data curve given is,

Q: What is the volume of an object of mass 20.00 g and density 2.0 g/mL? 1._______ / 2._______ =…

A: Given the mass of the object, m = 20.00 g  density of the object, d = 2.0 g/mL

Q: Convert the following (with solution) 1. 65 cm= ______ inches (") 2. 75'= ______ m 3. 10 m = ____…

A:

Q: A chemist makes 830. mL of silver nitrate (AgNO3) working solution by adding distilled water to 230.…

A: To find out the new concentration, use the dilution law and calculate the new concentration of…

Q: Alondr A chemist makes 260. mL of iron(II) bromide (FeBr,) working solution by adding distilled…

A: Dilution Equation M1V1 = M2V2M1 = Initial Molarity (stock Solution)V1 = Initial volumeM2 = final…

Q: Calculate the volume in milliliters of a 0.38 mol/L iron(II) bromide solution that contains 25.0 g…

A: The solution is given below -

Q: Calculate the volume in milliliters of a 2.4M sodium nitrate solution that contains 125. g of sodium…

A: Given data, Molarity of NaNO3 = 2.4 M                                  = 2.4 mol/ L Mass of NaNO3 =…

Q: What is the density of an object of mass 200.00 g and volume 25.0 mL? 1._______ / 2._______ =…

A: Given: Mass of object = 200.00 g And volume of object = 25.0 mL.

Q: 1) Convert 73.5 F to Celsius. Report your answer with the correct number of significant figures.…

A: 1) Given : Temperature in oF = 73.5 oF

Q: A student measured 10.5 mL of a stock caffeine solution with a concentration of 52.3 mg/mL and…

A: Initial volume V1 = 10.5 mLInitial concentration M1 = 52.3 mg/mLFinal volume V2 = 29.5 mLFinal…

Q: Convert 9.71 x 10-³ m to the equivalent length in nanometers. 9.71 × 10-3 m = nn

A: Unit conversion involves multiplication or division of numerical factors,  result should be obtained…

Q: You have a stock NaCl solution of 8 g/L.  You want to prepare 357 mL of a 5 mg/L NaCl solution.  How…

A: Given: The concentration of the stock NaCl solution = 8 g/L We have to find the volume of the stock…

Q: 735.13 mi 7. The density of methanol is 0.791 g/mL. What is the volume of a 10.0 g sample of…

A:

Q: A sample of waterer (density is 0.998 g/mL) is measured to be 25.7mL. What is the mass of water in…

A: Mass = Volume x density

Q: A chemistry student needs 5.00 g of thiophene for an experiment. She has available 1.2 kg of a 7.83%…

A:

Q: You put 84 mg/mL solution into a total volume of 177 mL. What is the concentration of the diluted…

A: Initial concentration= 84 mg/ml  Total volume= 177 ml

Q: A student measured the mass of an empty micropicnometer to be 2.000g. A student places 0.500mL of…

A: Part(a): Given that the mass of micropicnometer = 2.000 g Mass of micropicnometer + citric acid =…

Q: What volume in milliliter (mL) of a 6.0 M KCI solution is required to prepare 100. mL of a 1.50 M…

A:

Q: 6. Rand the following photons in terms of decreasing energy: IR (v= 6.5 x 1013 Hz), microwave (v =…

A: Numerically, The energy (E) of photons is related to frequency (ν) of photons in the following way…

Q: MEASUREMENT Setting up a one-step unit conversion A student sets up the following equation to…

A: 1 mL = 0.001 L

Q: In a similar experiment, a pair of students was asked to measure out 10.00 mL of water using a 25-mL…

A: Accuracy refers to closeness to the actual value. Precision refers to closeness among observed…

Q: Express 70 mM in the units of μmol/mL

A: Millimolar(mM) is defined as the number of millimoles present in 1 litre of the solution.

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A: Dimensional analysis is used to convert a physical quantity given in one type of unit to some other…

Q: 7. A submarine cruises through the water at a speed of 26.4 nautical miles per hour. If there are…

A: Question-7 Given data speed of submarine =26.4 nautical mileshr and  1.15 regular miles=1 nautical…

Q: A 53.5 % ethanol solution (v:v) has a volume of 221.4 mL.  What is the mass (g)  of ethanol in the…

A:

Q: You have a 15.0 M stock solution of Superstressin (something that little nervous dogs are known to…

A: Dilution of the solution: On dilution of the solution with the pure water, the mole of solute…

Q: 16. Chloral hydrate, a sedative and sleep-inducing drug, is available as a solution labeled 10.0…

A: The values are given as follows:

Q: prepare

A:

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.