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: A chemist prepares a solution of barium acetate BaCH3CO22 by measuring out 230. μmol of barium…

A: Volume of solution = 500 ml = 0.500 L Number of moles = 230 μmol = 0.230 mmol Here we have to find…

Q: A house has 4 rooms to paint and each room has an average of 750.0 ft2 to paint. if 1 quart can of…

A: Given: House has 4 rooms to paint. Area of each room = 750.0 ft2  1 quart of paint covers 125 ft2.

Q: A chemist adds 110.0 mL of a 5.1 mol/L sodium nitrate (NaNO,) solution to a reaction flask.…

A:

Q: A woman is planning on running a 10K (10.0 km) race. a. How many yards will she race? (1 yard = 3…

A: (a)Conversion of kilometers to yards:

Q: A protein drug vial has 10,000 Units that requires 4.2 mL of diluent to yield a concentration of…

A: Using dilution formula, final concentration of drug sample can be determined.

Q: A patient receives an intravenous (IV) solution that flows at the rate of 150 mL per hour. How long…

A: The word IV means intravenous which means the drug is administrated into the veins. The formula used…

Q: A chemist prepares a solution of barium chloride (BaCl,) by weighing out 17.1 g of barium chloride…

A: Find the solution below

Q: The military is helping waste facilities, they are using military holding tanks to gather and hold…

A: Given that rain fall of 1.00 inch in the building with 550 feet long and 450 feet width.We have to…

Q: A chemist prepares a solution of potassium iodide (KI) by measuring out 76. g of potassium iodide…

A: The concentration of a solution can be calculated as follows:

Q: A chemistry student needs 55.00 g of acetone for an experiment. He has available 0.20 kg of a 33.2%…

A: Given that,Mass of acetone=Mass of solution= Mass of solution student use= ?

Q: There are .355 in most cans. How many drops on this ? (20drops = 1 ml)

A: Assuming the given 0.355 is in milliliters.1mL = 20 drops.

Q: The formula for making a popular diaper rash paste requires mixing 40 g of zinc oxide powder and 80…

A: we have to calculate the cost of diaper rash paste

Q: What volume in L of 9.00 M nitric acid is needed to make 6.5 L of 1.00 M solution?

A: Given values are, N1= 9.00M V1=? N2=1.00M V2=6.5L

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: A chemist prepares a solution of silver perchlorate (AgCIOA) by measuring out 0.869 kg of silver…

A:

Q: A chemist makes 570.mL of zinc nitrate ZnNO32 working solution by adding distilled water to…

A:

Q: A chemist makes 640.mL of mercury(II) iodide HgI2 working solution by adding distilled water to…

A: When a solution of Molarity M1  and volume V1 is diluted by adding water to a final volume V2  and…

Q: many total ml (cc) will you inject into this patient?

A: The concentration of Demerol is 50 mg/mL and concentration of phenergan is also 50 mg/mL Given: mass…

Q: A chemist makes 270. mL of barium chloride (BaCl,) working solution by adding distilled water to…

A: Volume of Barium Chloride = 270.0mL Volume of distilled water = 210.0mL

Q: A chemist makes 0.880 L of silver(II) oxide (AgO) working solution by adding distilled water to…

A:

Q: Sulfuric acid solution is the electrolyte used in car batteries. Sulfuric acid is sold as a…

A: we have to calculate the volume of concentrated sulfuric acid solution

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 chemist must prepare 125. mL of 6.00 µM aqueous zinc oxalate (ZnC,0,) working solution. She'll do…

A:

Q: What volume of concentrated HCl (37.2% HCl m/m) contains 125 g HCl? The density of concentrated HCl…

A: 37.2 g HCl is present in 100 g of solution. Let the mass of solution containing 125 g HCl be x. the…

Q: An analytical chemist weighs out 0.118 g of an unknown monoprotic acid into a 250 mL volumetric…

A:

Q: The density of a solution of trisodium phosphate is 1.0896 g/cc, and it is 7.50 percent by mass.…

A: Density (d) = 1.0896 g/cc Mass = 23.0 g %w/w = 7.50 % by mass Mass of substance = 23.0×7.50/100    =…

Q: E O CHEMICAL REACTIONS Dilution A chemist makes 600, ml. of sodium nitrate (NaNO,) working solution…

A:

Q: A chemistry student needs 35.00 g of methanol for an experiment. He has available 0.50 kg of a 43.6%…

A:

Q: A chemist makes 460. mL of barium chloride (BaCl2) working solution by adding distilled water to…

A:

Q: A chemistry student needs 5.00 g of acetic acid for an experiment. She has available 250. g of a…

A: Given,  250 g of a 15.8% w/w solution of acetic acid in ethanol. And 5.00 g of acetic acid is needed…

Q: A chemist makes 980. mL of copper(II) fluoride (CuF,) working solution by adding distilled water to…

A: The given information is: Concentration of stock solution = 2.45 mM Converting the value of stock…

Q: phenobarbital elixir. If the phenobarbital elixir is available as 40. mgmg per 20. mLmL,

A: Given :- 20 mL phenobarbital elixir has mass equal to 40 mg  To calculate :- mass of phenobarbital…

Q: O Chemical Reactions Dilution 1/5 Bis A chemist must dilute 76.4 mL of 2.66 M aqueous sodium nitrate…

A: When we are diluting the solution by adding water we are not changing moles of solute so number of…

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…

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.