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What is the half-life of a first order reaction if 75.0% of the reactant has been consumed after 60 minutes?
During a period of discharge of a lead-acid battery, 405 g of Pb from the anode is converted into PbSO4 (s).
Question- The following thermochemical equation is for the reaction of Fe3O4(s) with Hydrogen(g) to form iron(s) and water(g). Fe3O4(s) + 4H2(g) --> 3Fe(s) + 4H2O(g)
Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal. M(OH)2 --> M^(2+0 +2OH^(-) Ksp= 5x10^(-16) M(OH)2 +2OH^(-) --> M(OH)4^(2-) Kf= 0.07. Estimate the solubility of M(OH)2 in a solution buffered at pH = 7.0, 10.0, and 14.0.
A particular element exists in two stable isotopic forms. One isotope has a mass of 34.9689 amu ( 75.77% abundance). The other isotope has a mass of 36.9659 amu. Calculate the average mass of the element and determine its identity.
The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr.
Describe how you would prepare each of the following aqueous solutions. - 230 g of a solution that is 0.60 molal in Na2CO3 starting with the solid solute.
what is the formula of the compound formed between strontium ions and nitrogen ions?a srnb sr3n2c sr2n3d srn2e
Problem- A galvanic (voltaic) cell consists of an electrode composed of aluminum in a 1.0 M aluminum ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potent..
above the threshold frequency, what must be increased to increase the number of electrons ejected? What must be increased to increase the energy of the electrons ejected
When liquid water at 0°C and 1 atm is converted to ice at 0°C and 1 atm, 6.01 kJ mol-1 of energy is released as heat to the surroundings. Calculate the change of entropy for the water, ΔSwater
To verify Boyle's Law using the relationship between gas volume and gas pressure when the amount of gas remains constant at certain temperature.
5.00g of Fe2O3 reacts with an excess of HCl to make FeCl3 and H2O. How many grams of FeCl3 can i make if the reaction is only 70% efficient
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