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A 670 mL gas sample at STP is compressed to a volume of 284 mL, and the temperature is increased to 20 C. What is the new pressure of the gas in Pa? Answer in units of Pa.
how much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol
In a chemical cold pack, two substances are kept separate by a divider. When the divider is broken, the substances mix and absorb heat from the surroundings. The chemical cold pack feels cold.
How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7g Fe? Fe2O3(s) + 3CO(g) -> 3CO2(g) + 2Fe(s)
500 ml of 0.150m sodium hydroxide is mixed to 595 ml of 0.200m weak acid determine nbspthe ph of the resulting buffer
A solution of ammonia and water contains 4.20×10^25 water molecules and 6.90×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
A 26.0-g sample of ice at -11.0°C is mixed with 123.0 g of water at 90.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
a 1.150g of the hydrated salt ZnSO4. XH2O is dissolved in water and the sulfate ion is precipitated by adding an excess of BaCl2 solution. The mass of Pure and Dry BaSO4 precipitated obtained is 0.9335g. What is the formula of the zinc sulfate hyd..
The density of H2O2 is 1.463g/ml and the density of O2 is 1.428 g/l. How many liters of O2 will from 55.0mL of H2O2?
Give a detailed mechanism for the nitration of bromobenzene . As part of your answer explain the regiospecificity
Calculate the temperature of the system once equilibrium has been reached. Assume that for Cp,m H2O is constant at its values for 298K throughout the temperature range of interest.
At what temperature will a solution of 8.27 g CaCl2 in 45.0 g H2O begin to freeze? Assume complete dissociation
Calculate the amount of heat needed to boil benzene (C6H6), beginning from a temperature of 6.7 degrees celcius.
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