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How many grams of iron are needed to produce 2.85 L of hydrogen gas according to the following reaction at 25oC and 1 atm? iron (s) + hydrochloric acid (aq)------ iron(II) chloride (aq) + hydrogen (g)
a 1.00L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate pH of the solution after the addition of 100.0mL of 1.00M HCl. Ka for HF is 3.5x10^-4
How many moles of the nonelectrolyte, propylene glycol(C3H8O2) should be dissolved in 800.0g of water to prepare a solution whose freezing point is -3.73C? For water, Kfis 1.86C m-1 and Kb is 0.51C m-1.
draw a representation for TPCP that would represent its structure if the phenyls were perpendicular to the 5-membered ring (a paddle-wheel structure) and a representation that represents the propeller structure.
What is the maximum amount of silver chloride that can be formed? IN GRAMS b.What is the FORMULA for the limiting reagent?
draw the form/structural formula that predominates after deprotonation with any appropriate formal charges and hydrogen atoms.
What is the freezing point of a solution prepared by dissolving 11.3g of Ca(NO3)2 in 115g of water? (The molal freezing point depression of constant water is 1.86 °C/m).
Consider the titration of 100.0 ml of .100M H2NNH2 by .200 M HNO3. Calculate the pH when the following volumes of HNO3 have been added
Arrange the four compounds below in order of increasing volatility.
After the reaction was complete, the solid residue, consisting of KNO2 and the original impurities, had a mass of 24.1 g. Assuming that only the potassium nitrate had decomposed, how many grams of KNO3 were present in the original sample? Answer i..
From the Bohr model of the hydrogen atom, what can we conclude about the energy required to excite an electron
An aqueous solution contains 167 g CuSO4 in 820 mL of solution. Calculate the : a. Molarity b. Percent by mass c. Mole fraction d. Molality of the solution, The density of the solution is 1.195 g/mL
What mass of NH4Cl should the student dissolve in the solution to turn it into a buffer with pH =8.77
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