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Calculate the work (in kJ) when 2.20 moles of methane react with excess oxygen at 384 K: CH4(g) + 2O2(g) ? CO2(g) + 2H2O(l) Hint, what would the answer be for 1 mole of carbon dioxide?
125 mL of H_2O is initially at room temperature (22.0C). A chilled steel rod at 2.0C is placed in the water. If the final temperature of the system is 21.5C, what is the mass of the steel bar?
Determine hydroxyl and hydrogen ion concentration in this solution. (if Ka for ammonium ion = 5.0 x 10^-10.)
What is the value of x in the formula for the hydrate? (hint: remember that x represents the ratio of moles of H2O to moles of hydrate compound, and that moles of hydrate compound equals the moles of anhydrous compound)
What is molarity of NaOH solution if 26.0ml of 0.380 M H2So4 solution is required to neutralize a 25.0ml sample of the NaOH solution
How much HCl is produced from the reaction of an excess of HSbCl4 with 3 moles H2S in the following reaction? HSbCl4 + H2S ! Sb2S3 + HCl
one mole of silicon si has a mass of 28.086 g, and one mole of carbon has a mass of 12.011 g. what is the mass of one mole of silicon carbide ?
A sample of calcium carbonate absorbs 45.5 J of heat upon which the temperature of the sample increases from 21.1 degrees celcius to 28.5 degrees celcius.
A buffer is prepared by mixing 675 mL of 0.50 M formic acid, HCHO2, and 325 mL of 0.50 M sodium formate, NaCHO2. Calculate the pH.
Ammonia burns in pure oxygen and reaction produces nitrogen and water. What is the amount of Nitrogen produced from 45.0 g NH3?
Nitrogen dioxide is obtained in a cylinder, but exists in equilibrium with dinitrogen tetrooxide. A 5.00g sample of this mixture is transferred to a 0.5L flask at 298K.
A particular brand of gasoline has a density of 0.737 rm g/mL at 25 C. How many grams of this gasoline would fill a 15.1 gal tank?
How many grams of ice at 0 degrees Celsius and 101.3 kpa can be melted with the addition of 0.400 kJ of heat.
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