What would be the final pressure
A gas is heated from 269 K to 283 K while its volume is increased from 21.5 L to 37.0 L by moving a large piston within a cylinder. If the original pressure was 1.10 atm, what would be the final pressure?
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An environmental chemist needs a carbonate buffer of pH 10.00 to study the effects of acid rain on limestonerich soils. How many grams of Na2CO3 must she add to 1.5 L of freshly prepared 0.20 M NaHCO3 to make the buffer? KA of HCO3- is 4.7 x 10-11
What is the change in enthalpy when 18.4 g of steam at 100?C is converted to liquid waterat the same temperature and pressure? Theheat of vaporization of water is 40.7 kJ/mole. Answer in units of kJ.
Calculate the percentage (by weight) of oxygen in the product formed when a 2.60-g sample of selenium combines with oxygen to give 4.18 g of a pure compound.
Explain the significance of the chromic acid test. What would you observe in the case of a positive result? Do you expect 9-fluorenol to give a positive or negative result? What about the 9-fluorenone?
How many moles of phosphine (PH3) are produced for every 4.0 moles of hydrogen that react according to the chemical equation below? Hint: Mole-Mole Cal.
State how much greater the bleach should be to be considered in large excess. If the dye is 1×10-5 M how much can the bleach be diluted before you no longer consider it to be in excess?
Explain why we can't assume that the pressure and the temperature of both gases will remain the same during the entire reaction.
In one experiment, 30.5g of dry ice are placed in an insulated, isolated container with 500g of water at 25.0°C. What temperature of the water is expected after all bubbles are gone? (The specific heat of water is 4.184 J/g. ° C
What products would you expect to obtain in the reaction of alpha-naphthaldehyde with KOH? Write a detailed reaction mechanism (including lone pairs and arrows to show electron flow).
How many milliliters of concentrated hydrochloric acid solution (36.0% HCl by mass, density = 1.18 g/mol ) are required to produce 10.0 L of a solution that has a pH of 1.94?
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