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A 4 g sample of the hydrated crystal Ba(OH)2• χH2O is heated until all the water is removed. The remaining solid weighs 2.17 g. Calculate the formula of the hydrated crystal.
a pound of coffee beans yields 70 cups of coffee (4cups=1qt) how many milliliters of coffee can be obtained from 1 g of coffee beans
Determine the iodide ion concentration (in molarity) in a solution containing 12.6 g CaI2 dissolved in 2750 mL of solution
What is the final temperature (in °C) of 1.53 g of water with an initial temperature of 12.0°C after 7.478 J of heat is added to it?
A certain second-order reaction (B-> Products) has a rate constant of 1.80×10^-3 M^-1xs^-1 at 27C and an initial half-life of 216 s . What is the concentration of the reactant B after one half-life?Express the molar concentration numerically.
A 1.000 g sample of a compound containing C, H and O is burned in excess oxygen, producing 1.783 g CO2 and 0.734 g H2O. Determine the empirical formula of the compound.
A 0.456 gram sample of an unknown monoprotic acid (let's call it HZ) was dissolved in some water . Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
Compute the structural analysis of the Protein and What order will the following proteins elute from a caution exchange column loaded at pH 6?
What is the minimum volume of 7.0M HCl required to completely dissolve 14.0 grams of magnesium metal?
Phosgene (COCl2) is a toxic substance that forms readily from carbon monoxide and chlorine at elevated temperatures: CO (g)+ Cl2 (g) ? COCl2 (g).
how many meters away is a cliff if an echo is heard one half second away? assume that sound ws traveled at 343 m/s on that day.
The density of hydrogen gas in a flask is 0.147 g/L at 305 K. what is the pressure inside the flask? Calculate the density in G/L of CH4(g) at 75 Celsius and 2.1 atm (R= .08206 L*atm/mol*K).
Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq) If 1.26 L of H2 gas are formed at STP, how many g of HCl reacted?
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