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A solution was prepared by mixing 38.15g of (a)potassium chloride with 427.53 g of water. What is the % concentration (wt/wt) of the solution? (b) How many liters of a 5.0% (wt/vol) glucose solution would it take to obtain 85g of glucose? Show method of calculation and formula used, please round to appropriate sig fig.
If the wire between points B and C breaks open, how much current will be measured by M1 and M3? How much voltage would be measured across points B and C?
a student produces 2.73 g of a compound. She calculates the theoretical yield as 3.40 g. What is the percent yield
a solution of vinegar is 5.40% by mass acetic acid in water. assuming the density of vinegar is 1.00g/mL, what is the molarity of the acetic acid?
Iodine-131 is a radioactive isotope. After 5.00 days, 65.0% of a sample of 131I remains. What is the half-life of 131I? please show all details on how you got the answer im really trying to understand this
Calcium Oxide reacts with water in a combustion reaction to producee calcium hydroxide: CaO(s) + H2O(l)----> Ca(OH)2(s)
A piece of copper has a volume 640 L. How many atoms does the sample contain.
what is the concentration of a household ammonia cleaning solution if 49.90 ml of .5900M HCL is required to neutralize 25.00 ml of the solution?
A system has four energy levels. The degeneracies of these energy levels are as follows: g0 = 3, g1 = 2, g2 = 1, g3 = 4. For 20 gas molecules, at T = 0 K, how many molecules are in the first excited state
A sample of wood since an egyptian mummy case gives a 14-C count of 9.4 counts per minute per gram of carbon. Explain how old is the wood? The initial decay rate of 14-C is 15.3 cpg/g C as well as the half-life is 5730 years
A modern multi-bladed windmill design is adapted to work in a tidal flow. When the water flows at 5 m/s, find the maximum power generated for a diameter of 4 m. Calculate the tip speed, and determine if cavitation could be a problem.
Consider the following reaction- N2 (g) + O2 (g) = 2NO (g)Given that delta G for the reaction at 25 degrees Celsius is 173.4 kj/mol calculate the standard free energy formation of NO
A solution of ammonia and water contains 2.70×1025 water molecules and 8.50×1024 ammonia molecules. How many total hydrogen atoms are in this solution
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