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22.4 liters of a gas weighs 70g at S.T.P. Calculate the weight of the gas if it occupies a volume of 20 liters at 27C and 700mm Hg of pressure
Calculate the expected change in temperature for 4.5 g of NH4NO3 dissolved in 100.0 mL of H2O. Assume that the calorimeter absorbs no heat.
A solution is prepared from 0.95 grams of H3PO4 ,(Phosphoric acid) and 1.15 grams of HClO4 (perchloric acid) in 150 mili litres of solution then determine how many milliliters of 0.425 M sodium hydroxide( NaOH) is needed.
The temperature of a 35.2 g sample of iron increases from 23.7 C to 29.5 C. If the specific heat of iron is 0.450 J/g-K, how many joules of heat are absorbed.
Suppose you placed 0.500 mol of COBr2 in a 2.00 liter flask and heated it to 73°C. After equilibrium was reached, suppose you added an additional 2.00 mol of CO to the flask at the same temperature
Calculate the amount of heat liberated (in kJ) from 383 g of mercury when it cools from 61.0°C to 11.0°C.
calculate the number of moles of KOH in 5.5mL of a .36 M KOH solution. what is the pOH of the solution?
the equilibrium contant kc=49 at 230^0C, for the reaction PCl3 + Cl2= PCL5. If 0.50mol of each of phosphorus trichloride and chlorine are added to a 5.0L reaction vessel.
A substance has a molar mass of 60 g/mol with 40.0 percent carbon, 6.7 percent hydrogen, and 53.3 percent oxygen. What is its empirical formula?
What mass of this substance must evaporate in order to freeze 150g of water initially at 15C? (The heat of fusion of water is 334J/g the specific heat of water is 4.18J/g*K.)
Explain the structure of the main mononitration product(s) of 3 bromo 1 nitrobenzen?
a sample of nitrogen gas kept in a container of vulume 2.43 L and temp 27degree C exerts a pressure of 4.83 atm. calculate the number of moles of gas present
calculate What mass of AlBr 3 is formed and calculate what mass of CCl 4 will be formed if 1.5 moles of CH 4 react with 1.4 moles of Cl?'
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