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1. Calculate the theoretical yield of aspirin to be obtained, starting with 2.0 g of salicylic acid. 2. If 1.8 g of aspirin were obtained in this experiment, what would be the percent yield? 3. Write the general formula for obtaining an ester from an acid and an alcohol. 4. Identify R and R' in Equation 1 when ester, aspirin, is made from salicylic acid and acetic acid
An airbag in?ates in less than 50 msec by the reaction of NaN3 to produce Na and nitrogen gas at 25 ?C. NaN3 → Na + N2 The volume of the airbag is about 30 liters, and it is ?lled to a pressure of 1.4 atm.
Solutions of AgNO3 and KCl are combined and 0.683 g of a precipitate are formed. What is the precipitate and how many moles were formed.
Calculate how the amount of AgCl(s )will change when the equilibrium is disturbed by Adding AgNO 3
A 10 liter sample of oxygen 0.0°C and 15 cm. pressure is subjected to 150 cm. pressure at the same temperature. What is the new volume of the oxygen?
A tank of hydrogen has a volume of 22.9 L and holds 14.0 mol at 12.0 C, what is the pressure of the gas in atm
How many moles of methane (CH4) gas are in 745 mL at 25.5C and 730 torr?
What mass of solid citric acid (g) and how many milliliters of 0.500 M NaOH are needed to produce 100.0 mL of a buffer with a pH of 6.50 and a weak base concentration of 0.0250 M
What is the molarity of 2500. mL of a solution that contains 160. grams of NH4NO3?
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
Determine the mass of this substance should evaporate in order to freeze 190 grams of water at 25 degree Celsius initially? It is given that the heat of fusion H 2 O= 334 specific heat of H 2 O= 4.18
How many formula units make up 26.2 g of magnesium chloride (MgCl_2)?
Consider the following specific heats: copper, 0.384 J/g·?C; lead, 0.159 J/g·?C; water, 4.18J/g·?C; glass, 0.502J/g·?C. If the same amount of heat is added to identical masses of each of these substance
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