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How many grams of sodium are needed to produce 33.3 L of hydrogen gas according to the following reaction at 25oC and 1 atm?
sodium (s) + water (l) -------sodium hydroxide (aq) + hydrogen (g)
Calculate molarity of solution obtained by dissolving 0.212g of Na2CO3 in 250cm3 of solution?
How much energy is needed to raise the temperature of 16.0g of gold by 17.0degrees C, Answer in units of J
Consider a saturated colution of calcium oxalate, CaC2O4, in which the following reactions can occur: (CaC2O4)4 -2 (s) ---> Ca+2 + C2O4 -2 Ksp=1.3e-8
Methyl red is an indicator that changes between yellow and red. In solution methyl red (HMR) dissociates as follows:
Calculate the molar concentration of illinic acid and of its conjugate base illinate ion (in moles/L; M) in a 3 M illinate buffer at pH 7.5. The pKa of illinic acid is 6.7.
Which monatomic ion has a charge of 1+ and the electron configuration [Kr]4d105s2? Write the element symbol and charge.
Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by incineration. Even an empty can contains residual gaseous propellant.
a 150.0 g sample of metal at 80 c is added to 150.0g of H2O at 20 c. the temperature rises to 23.3 c. assuming that the calorimeter is a perfect insulator, what is the specific heat of the metal?
Use the distance between the charges (the spring length) BEFORE contraction to get the spring force (using coulomb's law) and divide that by the distance that it contracted to get the spring constant OR
What is the percent yield of a reaction using 10 moles of acetone and 16 moles of benzaldehyde and obtains
A weak monoprotic acid is exactly neutralized by 11.17mL of a standardized 0.1455M NaOH solution. If the Ka of the acid is 0.00084, what is the pH at the half-equivalence point.
Give the structures of a hydrocarbon that has six carbon atoms and a) three vinylic hydrogens and two allylic hydrogens b) three vinylic hydrogens and no allylic hydrogens
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