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a chemical reaction produced .311 g sample of gas which occupied 225 mL at 55 degrees C exerting a pressure of 86 mm Hg. what is the molar mass of the gas?
Plot pH values as a function of volumes of added KOH and suggest appropriate indicators for the titration.
If 4.50 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
When 36.8g of benzene reacts with an excess of chlorine gass, the acual yield of 38.8g what is the percentage yield?
What will be the theoretcal yield of tungsten(s) ,W, if 45.0 g of WO3 combines as completely as possible with 1.50 g of H2? WO3(s) + 3H2(g) => W(s) + 3 H2O(g)
Which of the following correctly summarizes the exact relationships between the SN values of 2 to 6, the hybrid orbital names, and the predicted geometries for molecules that have hybridized central atoms?
a solution is made by mixing 20.0 mL 0.4 M NaCH3COO with 30.0 mL 0.4 M CH3COOH, calculate the pH? For acetic acid, Ka = 1.76 x 10-5.
odium carbonate (Na2CO3) can be produced by heating sodium bicarbonate (NaHCO3). A student heats 5.128 g sodium bicarbonate to completely decompose the sample to sodium carbonate.
5.00 mL of water sample was titrated for hardness with 4.15mL of 0.0200M EDTA. write the equastion for the reaction and calcualte the hardness of the water in ppm
a sample of propane, contains 17.7 moles of carbon atoms. How many total moles of atoms does the sample contain.
The reactant concentration in a zero-order reaction was 7.00×10-2 after 105 and 1.50×10-2 after 350 . What is the rate constant for this reaction.
Calculating the equilibrium constant (Keq) for the given reactions - Determine the Keq for the following reactions
0.113 m aqueous solution of a weak acid, HA, is 2.23% ionized. At what temperature does it freeze? Kf for water = 1.86o C/m.
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