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The purity of a sample containing zinc as well as weighing 0.198 g is determined by measuring the amount of hydrogen formed while the sample reacts with an excess of hydrochloric acid. The determination illustrates the sample to be84.0% zinc. Explain what amount of hydrogen measured at STP was obtained?
If an ionic equation has 2H+ (aq) on the left side as well as H2 (g) on the right. Are these species spectators as well as show how it worked out
What is the osmotic pressure of a solution that contains 4.26 ×10-3 moles of lactose in 111 mL of solution at 29C?
The delta G inital for the dissociation of an aqueous solution of a weak acid at 25 degrees celcius is 14.8 kJ. What is the calue of Ka for the acid?
If 0.628 moles of a substance weighs 77.3 g, what is the molar mass of the substance, in units of g/mol?
In biochemistry laboratories, solutions of sucrose (table sugar, C12H22O11) are used in high speed centrifuges to separate the parts of a biological cell. How many liters of 2.69 M sucrose contain 217 g of solute
When 190.0 mL of 0.360 mol are added to 190.0 mL of 1.00×10?2 M AgNO3 (aq), what percentage of the Ag+ is left unprecipitated?
how does the average kinetic energy of different gases compare when they are at the same temperature?
Consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in a AgNO3 solution..
What mass of Sucrose(C12H22O11) should be combined with 456g of water to make a solution with an osmotic pressure of 8.05atm at 280K
when 3-methyl-1 5-pentanediol is warmed with polyphosphoric acid the major product has a molecular formula c6h12o. what
The carbon atom model has an additional rotational axis of symmetry that is NOT threefold. Use an arrow to show the location of one of these in a figure of the carbon atom model.
for the following electrochemical cellzns zn21 m h?m h21 atmpta what reaction takes place at the anode? b what
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