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QS: how would the calculated molar mass change(increase,decrease,no change) if the following experimental problems were encountered? explain the reason for your answer. (a)the unknown was impure and only part of the unknown dissolved in the lauric acid (b) your unknown contained a substance which produced two ions per molecule of unknown when dissolved in the lauric acid (c)the unknown was insoluble in lauric acid (d)a very small amount of lauric acid was spilled after weighing,but before being placed in the test tube
Final temperature after urea dissolves in water, What is the final temperature of the solution in kJ? The density of water is 4.18 J/g·°C. What is the final temperature in °F? F = °C x 1.8 + 32 (Round your answer to one decimal place)
Chemical Structure and Hydrogen Bonds in Base Pairs, Draw the chemical structure of a correctly base paired G-C pair, then re-draw the pair with a propeller twist these answers should all be on one page following box G.
Write the unbalanced equation for the formation of ozone gas from oxygen gas. (Include states-of-matter under SATP conditions in your answer.)
World energy supplies are often measured in the unit of quadrillion British thermal units (1012 Btu), generally called a "quad." In 2015, world energy consumption is projected to be 5.81 ×1017kJ.
to scale-forming water to convert calcium carbonate to calcium bicarbonate. write the chemical equation for this reaction.
What is the molarity and osmolarity of a 1 liter solution with .2 moles of calcium chloride. How many molecules of chloride are dissolved in solution
Acetylenic fatty acids are found in many tropical plants. Compound C, C18H30O2, is one such compound; it absorbs 3 equivalents of H2 when treated with H2 over a Pd/C catalyst. Ozonolysis of compound C produces the following products:
element z has two isotopes: one has mass number of 19.0 amu is 55.0% abundant,and the isotope with mass number 21.0 amu is 45.0% abundant. what is the average atomic mass for element Z?
Rank from longest to shortest distance. To rank the items as equivalent, overlap them.
How can you tell the difference between a joule of energy and a calorie of energy by looking at bars
A 14.31 g sample of hydrated magnesium sulfate (MgSO3• x H2O) is heated to remove the water of crystallization and 6.99 g of anhydrous magnesium sulfate (MgSO4) remains.
mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of the reactant in excess will remain after the reaction?
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