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Ammonia(NH3) rapidly reacts with HCl, making ammonium chloride(NH4Cl). Calculate the number of grams of excess reactant when 3.80g of NH3 reacts with 4.20g of HCl. Chemical equation= NH3+HCl----->NH4Cl
What volume (in liters) of 1.04 M KOH solution should be added to a 0.090 L solution containing 9.3 g of glutamic acid hydrochloride (Glu, FW=183.59; pKa1=2.23, pKa2 =4.42, pKa3=9.95) to get to pH 9.90?
A gaseous mixture of rm O_2 and rm N_2 contains 36.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 485 mmHg?
A Sprinter set a high school record in track and field, running 200.0 m in 21.4s. What is the average speed of the sprinter in kilometers per hour? Express your answer numerically in kilometers per hour.
Calculate the pH of 9.2E-8 M NaOH, ignoring activity coefficients. Report the pH using the correct number of decimal places.
Using standard molar entropy values, calculate delta standard molar entropy values for the following reactions. In each case account for the sign of delta standard molar entropy.
Predict whether the following compounds will undergo the benzoin condensation, faster slower than benzaldehyde or give no reaction. You must think about the intermediate and the nucleophile
Calculate the total pressure (in atm) of a mixture of 0.0270 mol of helium, He, and 0.0200 mol of oxygen, O2, in a 4-L flask at 20°C. Assume ideal gas behavior.
If a 2.1 L reaction vessel initially contains 723 torr of cyclopropane at 485 degrees C , how long will it take for the partial pressure of cylclopropane to drop to below 105 torr ?
Calculate the entropy of fusion of a compound at 20 oC given that enthalpy of fusion is 45 kJ/mol at its melting point of 162 oC and Cp of liquid
What is the pressure (in atmospheres) of a sample of gas trapped in the closed-tube mercury manometer
Draw a fully labeled M.O. diagram for carbon monoxide. Be sure to show the atomic orbitals that come together to form the molecular orbitals, and give the orbital type designations. You may disregard core electrons (1s electrons from the atoms).
For each reaction, use the solubility rules as well the equations in the background information to predict if there is a reaction, If there is no reaction indicate so by writting NR under predictions, write gas for gas formation and PPT for precip..
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