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2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 535 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
What is the percent by mass of NaHCO3 in a solution containing 60 g of NaHCO3 dissolved in 600 mL of H2O?
Calculate concentrations of OH- and the pH of each basic solution. Since NaOH donates on OH- ion for each NaOH molecule, the OH- concentration is equivalent to the NaOH molarity. The pOH is calculated as -log[OH-] and the pH is calculated as 14-pO..
What is the molarity of a solution made by dissolving 74.8 g of strontium perchlorate in sufficient water
The latent heat of fusion for sodium is 2.6kJ/mol. How much heat is needed to melt 46g of sodium at its melting point of 98 degree Celcius?
The contents of one 80. lb bag of topsoil will cover 30. square feet of ground to a depth of 1.7 in. What number of bags are needed to cover a plot that measures 600. by 700. m to a depth of 1.5 cm.
Heat is lost to the styrofoam calorimeter. Assuming a 6.22 C temperature change for the reaction of HCl(aq) with NaOH(aq), calculate the heat loss to the inner 2.35-g styrofoam cup. The specific heat of styrofoam is 1.34 J/gC.
A 4.20 g nugget of pure gold absorbed 299 J of heat. The initial temperature was 22.0°C. What was the final temperature.
An acre of corn can produce about 375 gallons of ethanol, using only the kernel of the corn for conversion to ethanol. Assume the energy input to produce an acre of corn is 15000000 kJ.
A sample of MgCl2 is known to be contaminated with NaCl. A 3.47-g portion of the sample is dissolved in water and treated with an excess of AgNO3 solution.
if a gas is at 2.3 atm of pressure and occupies 32 L of volume, how much volume will it occupy if the pressure is lowered to 1.5 atm?
What carbonyl compound would the following condensation product? Which of the following could result from a self-aldol condensation followed by dehydration?
The mass of a golf ball is 45.9 g. If it leaves the tee with a speed of 61.0 m/s, what is its corresponding wavelength?
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