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A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.925 g/L at 690 torr and 110 C. What is the molecular formula?
Suppose that 25g of gold is initially at 27 degrees Celsius. What's the final temperature of gold upon absorbing 2.35kJ of heat?
A solution is made by mixing 500 mL of .167 M NaOH with 500 mL of .1 M CH3COOH. Calculate the equalibrium concentrations of H+. CH3COOH, CH3COO-, OH- and Na+
A chemistry handbook lists the solubility of sodium Iodide as 184 grams per 100mL of water at 25 degrees celsius. How many moles of NaI can be dissolved in 100mL of water at 25 degrees celsius?
Calculate the amount of water (in liters) that a camel can produce from 1.0 kg of fat. Assume for simplicity that the fat consists entirely of tripalmitoylglycerol. please show work how you arrive with the answer.
A sample of hydrogen gas occupies 15.8 L at STP. How many moles of the gas are present?
what is the grams of 9.31 x 10^24 molecules of methanol (CH3OH)? combining 0.357 mol of Fe2O3 with excess carbon produced 19.2g of Fe ; Fe2O3 + 3C ---> 2Fe + 3CO what is the actual yield of iron?
Sodium carbonate (Na_2CO_3) is used to neutralize the sulfuric acid spill. How many kilograms of sodium carbonate must be added to neutralize 6.05×10^3 kg of sulfuric acid solution?
Calculate the mass of the solvent (CCl4) in kg. Use the molality calculated in question 2 and the solvent mass calculated in question 3 to determine the number of moles of solute present in this solution.
how many joules of heat are produced for each electron? c. If the circuit operates for thirty mins, how many mles of electrons will have flowed through the resistor?
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400. g of water.
How many grams of manganese may be formed by the passage of 32,349 C through an electrolytic cell that contains an aqueous
The burning of sufficient magnesium in oxygen to form 2.00 grams of magnesium oxide results in the liberation of 30.1 kj.
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