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A 30.5 g sample of an alloy at 95c is placed into 50 gm water at 25c in an insulated coffee cup with a heat capacity of 9,0J/K (heatcapacity of water : 4.184 j/g/k) if the final temperature of the system is 30c, what is the specific heat capacity of the alloy
During the chlorination of drinking water and wastewater, what is it that makes chlorine an effective microbiocide?
What is the ground state electron configuration for the boron atom? What term symbols can arise from this electron configuration?
If we took EXACTLY 1.00 ml of a 1.000 M solution of Cu(NO3)2 and placed it in 99.000 ml of water and mixed it, then took 2.00 ml of this solution and placed it in 18.000 ml of water.
Calculate the standard entropy change for the reaction 2H2(g)+ 02(g) --> 2H_2O(l) using the data from the following table: Substance Delta Hf degrees Delta Gf degrees S degrees
A mixture of 6.0 mol of H2(g) and 3.0 mol of O2(g) is placed in a sealed evacuated container made of a perfect insulating material at 27 C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the water.
How much PV work is done, if 90 grams of ethylene and 120 grams of HCl are allowed to react at atmospheric pressure and the volume change is -71.2 liters?
How many molecules are in 22.41 L of an ideal gas at STP? Remember the answer is supposed to be in molecules
Calculate the change in internal energy of the gas in each case of these processes.
The temperature of a block of copper metal (molar mass 63.55 g mol-1) fell by 8.52 K when the copper block released 64.5 J of heat. What is the mass of the copper block?
A 100g sample of water at 27oC is poured into a 76.2g sample of water at 89oC. What will be the final temperature.
The density of mercury is 13.595 g cm -3 . What will be this value in SI units? Give the SI units and their symbols for the following physical quantities:
assuming the volume of the stomach is 1.0L, what will the pH change of the stomach acid resulting from the ingestion of one regular strength strength maalox tablet?
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