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A piece of copper has a volume 640 L. How many atoms does the sample contain.
A 0.0100 molal aqueous solution of a weak acid freezes at -0.0219 oC. Calculate the percent ionization of the weak acid, HA.
A sample of C3H8 Has 3.84X10^24 H atoms. a) how many carbons does the sample contain b) calculate the total mass of the sample
3.00×10-3 mol of HBr are dissolved in water to make 18.0 L of solution. What is the concentration of hydroxide ions, [OH^-], in this solution?
A 295 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
Questions on chemical equations - Write a balanced equation for this reaction. Include the states of matter for each compound.
Show how many µL of protein sample you will take and add with the desired volume of DTT and Laemmli buffer to make the right concentration of sample.
In the oxidation of glucose (C6H12O6), water and carbon dioxide are formed when the sugar is reacted with oxygen gas. If 4.39 grams of glucose are reacted, assuming 100% yield, how many moles of carbon dioxide would evolve?
Car air bags operate by the explosive reaction of NaN3: 2NaN ( ) 2Na( ) 3N ( ) 3 2 s s + g
Using an aqueous solution of Ba(NO3)2 the density of this solution is measured to be 3.640g/ml and this solution containing barium nitrate mole fraction of 0.01704. compute the molarity of this solution?
acetylene gas undergoes combustion to produce carbon dioxide and water vapor. if 75.0 L of co2 are produced how many liters of acetylene are required?
What masses of iron(III)oxide and aluminium must be used to produce 15.0g iron? What is the maximum mass of aluminium oxide that could be produced?
What proportions of ethanol and water should be mixed in order to produce 100 cm3 of a mixture containing 50 percent by mass of ethanol.
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