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2.3 grams of sodium reacts violently with excess water and 0.080 grams of hydrogen are collected. What are the theoretical and percent yields of hydrogen gas?
a student titrated a 10 ml sample of a saturated solution of borax. if the titration required 23.95 ml of 0.2556 m hcl
The activation energy for the gas phase decomposition of difluoroperoxide is 72.4 kJ. F2O2 F2 + O2 The rate constant at 238 K is 8.04E-4 /s. The rate constant will be /s at 286 K.
Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance 78.99%), 25Mg (isotopic mass = 24.9858 amu, abundance 10.00%), and 26Mg (isotopic mass = 25.9826 amu, abundance 11.01%)
quicklime cao is produced by thermal decomposition of calcium carbonatecaco3. calculate the volume of co2 at stp
titrate the first HA solution with 87.4 mL of 0.0906 M NaOH and the mixture of HA and HB in the second flask with 94.0 mL of the NaOH solution. Calculate the molarity of the HA and HB solutions.
an unknown organic compound is mixed with 0.5190 g of naphthalene crystals to give a mixture having a total mass of
Which of the following metals will be oxidized by Pb(NO3)2: Zn, Cu, Fe? Write the balanced molecular, ionic and net ionic equations for the reaction.
A 0.831-g sample of SO3 is placed in a 1.00-L container and heated to 1100 K. The SO3 decomposes to SO2 and O2: 2SO3(g) 2SO2(g) + O2(g). At equilibrium the total pressure in the container is 1.300 atm. Calculate Kp for the above reaction at 1100..
determine what mass of h2 is formed when 35.6 grams of zinc metal is combined to an excess of dilute hcl?3 nog n2og
what concentration of aqueous NaCl solution freezes at -15.2 C? the freezing point of pure water is 0.0 C and Kf of pure water is -1.86 C/m.
If carbon dioxide gas is collected over water at 25 °C and 775 torr, what is the partial pressure of the CO2? The vapor pressure of water at 25 °C is 23.8 torr.
Suppose that the atomic mass unit (amu) had been defined as one-sixth of the average mass of an atom of fluorine instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of phosphorus be on this new scale
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