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How many liters of h2 gas at stp can be produced by the reaction of 4.60g of Na and excess water, accoring to the following equation?2Na(s) + 2H2O(l) ---> H2(g)+2NaOH(aq)
how many liters of fluoridated drinking water would a 70 kg person have to consume in one day to reach this toxic level? How many kg of sodium floride would be needed to treat a 7.49x10^6 -gal reservior?
if a sample of 2.63 L of neon is collected at 730 torr and 26 degrees C, what volume will the gas occupy at 1.10 atm and 10 degrees C?
Doubling the distance between an individual and the source of radiation reduces the radiation exposure to one-fourth the original value.
evaporating sweat cools the body because evaporation is endothermic and absorbs 2.44 per gram of water evaporated.
PVA (polyvinyl alcohol) strands can form hydrogen bonds between different parts of the same strand. Illustrate how this can occur by using a sketch to show the hydrogen bonding.
Which statement best desrcibes the energy change as bonds are formed and broken in this reaction ?
Calculate the enthalpy of vaporization of Br2. This element has vapor pressures of 271 mm Hg and 565 mm Hg at 30.0 °C and 50.0 °C, respectively.
The reaction and rate law for the gas-phase decomposition of dinitrogen pentaoxide are 2 N2O5(g) ---> 4 NO2(g) + O2(g), rate = k[N2O5]. Which of the following can be considered a valid mechanism(s) for the reaction
Calculate the enthalpy change (energy needed) to convert 18 grams of ice at 0 Celcius to water vapor(steam) at 100 Celcius under constant pressure.
Describe the technique used to determine the density of approximately 5 gram samples of the following at 20 degrees C and 1 atmosphere pressure: A) Gasoline B) Granular Sugar C) A lump of gold D) Mercury
Which of the following groups would have the highest priority in determining R and S. a) CH2CH2OH b) CH(CH3)2 c) CH2CH3 d) CH2C(CH3)3
For each of the following slightly soluble salts, write the equilibrium equation for dissociation and the solubility product expression: a)CuS b)Ag2SO4 c)Zn(OH)2
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