Show work. don't give Ai generated solution A chemist prepares a solution of calcium bromide (CaBr2) by. measuring out 25. μmol of calcium bromide into a 50. mL volumetric flask and filling the flask tothe mark with water.Calculate the concentration in μmol/L of the chemist's calcium bromide solution. Be sure your answer has the correct number of significant digits.

According to significant figure rule the number have least significant figure known as limiting…

Answered: A chemist prepares a solution of…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter2: Chemical Compounds

Section: Chapter Questions

Problem 105QRT

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Beakers (a), (b), and (c) are representations of tiny sections (not to scale) of mixtures made from pure benzene and pure water. Select which beaker gives proper representation of the result when the two pure substances are mixed.
1.87 A solution of ethanol in water has a volume of 54.2 mL and a mass of 49.6 g. what information would you need to look up and how would you determine the percentage of ethanol in this solution?
1.89 Imagine that you place a cork measuring 1.30cm4.50cm3.00cm in a pan of water. On top of this cork, you place a small cube of lead measuring 1.15 cm on a side. Describe how you would determine if the combination of the cork and lead cube will still float in the water. Note any information you would need to look up to answer the question.
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The photograph below shows a beaker of water and a sugar cube, the combined mass of which is balanced by the weights on the right pan. The sugar cube is then placed in the water, and it dissolves completely. Do weights need to be added to or taken away from the right pan to keep the system in balance? Explain.
To determine the average mass of a popcorn kernel, you collect the following data: Plot the data with number of kernels on the x-axis and mass on the y-axis. Draw the best straight line using the points on the graph (or do a least- squares or linear regression analysis using a computer program), and then write the equation for the resulting straight line. What is the slope of the line? What does the slope of the line signify about the mass of a popcorn kernel? What is the mass of 20 popcorn kernels? How many kernels are there in a handful of popcorn with a mass of 20.88 g?
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Please put the right amount of significant figures
A chemist prepares a solution of barium chloride BaCl2 by measuring out 44.0μmol of barium chloride into a 150.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /molL of the chemist's barium chloride solution. Round your answer to 3 significant digits.
A chemist prepares a solution of barium acetate BaCH3CO22 by measuring out 27.μmol of barium acetate into a 250.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /μmolL of the chemist's barium acetate solution. Be sure your answer has the correct number of significant digits.

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