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A sample of 10mL of a solution of KBr has a mass pf 12.60g. While the solution is evaporated, the residue weighs 3.80g. With this data determine:
a) The density of the solutionb) The % of mass of the solutec) The molarity of the solution
the two most popular types of fuel for fuel cells are hydrogen and methane or natural gas. while hydrogen fuel cells
A solution is 0.034M in Na2SO4 and 0.035M in Na2CrO4. Solid Pb(NO3)2 is added without changing the volume of the solution. A. Which salt will precipitate first?
Suppose that the atomic mass unit (amu) had been defined as one-twelfth of the average mass of an atom of nitrogen instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of potassium be on this new scale
If 15.3 kilograms of Al2O3(s) , 60.4 kilograms of NaOH and 60.4 kilograms of HF react completely, how many kilograms of cryolite will be produced. What is the total mass of the excess reactants left over after the reaction is complete
A 0.13 M solution of a weak monoprotic acid has a pH of 4.11. what is the Ka of this weak monoprotic acid
Determine the numbers of oxygen molecules are required for each molecule of C 6 H 12 O 6 glucose that is oxidized if Glucose is oxidized by molecular O 2 to CO 2 and H 2 O?
write a 200 word essay in any style and identify and discuss three key features associated with the combustion of
The book's answer says not reaction and I need someone that will explain a step by step why they'er isn't a reaction for this problem. I don"t see it, is there a trick or hint that would tip me off so I can identify it quickly
use of fossil fuels.we use fossil fuels oil gas coal for many things power for transportation electricity production
How much concentrated hydrobromic acid solution (48.0% HBr by mass, d = 1.52 g/mL), in milliliters, is required to produce 10.0 L of 0.185 M HBr
Why is it an important concept that atoms generally appear in whole number molar ratios to each other in chemical compounds, and in general, would you expect that students would find this ratio to be lower or higher than the actual ratio
When do you expect to see signal distortions in 1H-NMR spectrums? What kind of distortions can occur? How can you minimize the appearance of distortions
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