What is the percent by mass of nahco3
What is the percent by mass of NaHCO3 in a solution containing 30 g of NaHCO3 dissolved in 500 mL of H2O?
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Dimethylhydrazine, (CH3)2NNH2, was used as a fuel for the Apollo Lunar Descent Module, with N2O4 being used as the oxidant. The products of the reaction are H2O, N2, and CO2. i) Write a balanced chemical equation for the combustion reaction.
The gas pressure measured at 20.0 degrees C is 1.95 atm. Assuming ideal gas behavior, how many grams of ammonia are in the flask?
A mineral crystallizes in a cubic closest packed array of oxygen ions with aluminum ions in some of the octahedral holes and magnesium ions in some of the tetrahedral holes.
All of the ice melts and the temperature of the water decreases to 0.0 degrees celcius. HOw many Kg of water were in the sample?
What is the ionic equation of the following formulas: NaCl, CaCl2, AlCl3, HCl, KOH, H2C2O4, K2C2O4, CH3COOH, H2O (distilled), H2O (tap), and ethanol?
What is the composition of vapor of a pentane-hexane solution that has a vapor pressure of 373 torr at 25 degree celcius? Given is Pure Hexanes and pentanes vapor pressure at 25 degrees celcius. Pentane - 511 torr. Hexane -150 torr.
A student placed 17.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask was reached. The flask was then shaken until the
Aluminum oxide (Al2O3) is a widely used industrial abrasive (corundum, emery). How is the hardness of an ionic material related to its lattice energy?
Calculate the minimum number of grams of propane, , that must be combusted to provide the energy necessary to convert 5.00 kg of ice at -17.5 degrees Celsius to liquid water at 77.0 degrees Celsius.
Sodium sulfite and acidified potassium permanganate produces a brown, partly dissolved solid, found in a solution which changes colour from purple (the potassium permangante) to yellow. What are the products?
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