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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?
MgNH4PO4.6H2O loses H2O stepwise as its is heated between 40 degree celcius and 60degree celcius the monohydrate is formed and above 100 degree celcius the anhydrous is formed what are the phosphorus percent of monohydrate and of the anhydrous mat..
What is the H3O+ concentration of the solution?
Problem- Synthesize (E) 2-Butenal using ethanol as the only source of carbon. Please show all steps, reagents and solvents, including protenation/deprotenation.
a 1.728g sample of pbcd alloy was dissolved in acid and diluted to exactly 500ml. titration of a 25.00ml aliquot at a
Calculate the standard cell potential (E) for the reaction X(s)+Y+(aq) -> X+(aq)+Y(s) if K = 5.33 x 10^-3. Express your answer to three significant figures and include the appropriate units.
A compound is 40.0%C, 6.70%H, and 53.3%O by mass. Assume that we have a 100.g sample of this compound. What are the subscripts in the empirical formula of this compound?
The temperature of the acid solution increases from 24.2 oC to 29.9 oC. Calculate deltaH for the reaction that occurred.
A vineyard has 145 acres of grapes. A soil supplement requires 5.50 grams for every square meter of vineyard. Explain how many kilograms of siol supplement are required for the entire vineyard. 1km2=247 acres
how many milliliter of 0.165M KMnO4 are needed to react with 108.0ml of 0.165 M oxalic acid? How many milliliter of 0.165M oxalic acid are required to react with 108ml of 0.165M KMnO4
a 255-mL sample of a HCl solution reacts with excess Ca to produce 14.0 L of H2 gas at STP. what is the molarity (M) of the HCl solution? Ca(s) + 2HCl(aq) > CaCl2(aq) + H2(g)
Estimate the temperature and pressure where 1.0 mole of O2 will correspond to 1.0 mole of N2 at 3.0 atm and 10 degrees Celsius.
what mass of calcium metal could be obtained from one kg of limestone that is 50.0 pure
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