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a sample of gas weighs 4.134g and has a volume of 910.0ml at 895.0 torr and 39.0 c. what is the molar mass?
a weather baloon is filled with 195.0 L of He and launched from sea level. The baloon is designed to continue its ascent to an altitude of 30 km. If the atmospheric pressure at 30 km is 28.0 torr an
The student next added 3M KOH solution to the aqueous solution and Mg(OH)2 precipitated. After filtering the solution and drying the precipitate, the student recovered 1.10g of Mg(OH)2. Calculate th
A 35 ? lamp and a 90 ? lamp are connected in series and placed across a potential of 40 V. What is the voltage drop across the first lamp
The base peak in the mass spectrum for this compound indicated the compound lost a fragment that has an m/z=17. This fragmentation corresponds to the loss of a(n)
At -11.0 °C (a common temperature for household freezers), what is the maximum mass of sorbitol (C6H14O6) you can add to 2.50 kg of pure water and still have the solution freeze? Assume that sor
If the initial pressure of NH3(g) is 1.766 atm, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 600.0 °C is 4550
A typical helium nucleus consists of two protons and two neutrons. What is the electric force between the nucleus and one of the electrons orbiting the nucleus
Name a few solutions you come in contact with every day. What substances make up these solutions. What is the solvent and the solute
Calculate the amount of N2 gas released (in liters) when the diver returns to the surface of the water where the partial pressure of N2 is 0.80 atm.
Make the following assumptions in your calculation; at normal filling conditions, the densities of engine coolant and water are 1.11 g/mL and 0.998 g/mL respectively. Assume that the engine coolant
Suppose 145 moles of a monatomic ideal gas undergo an isothermal expansion from 1.00m^3 to 4,00 m^3, How much work is done by the gas during this expansion
A 1.5 ?F capacitor is charged to 57 V by a battery, which is then removed. At time t = 0, Calculate the potential difference VL(t) across the inductor as a function o
Write a complete balanced equation for the neutralization reaction between HCl and NaOH.
predict whether a reaction will occur in each of the following. if so write the balanced chemical equation as well as the net ionic equation. Phases are all required for all species.
Two spheres are 7.66 m apart, and each has the same amount of positive charge. what is the charge on each sphere
Oxygen difluoride, OF2, is a colorless, poisonous gas that reacts rapidly with water vapor to produce O2, HF, and heat. OF2(g) + H2O(g) --> 2HF(g) + O2(g) + 324.4 kJ
A heat engine operates between two reservoirs whose temperatures are 139.3°C, What is the maximum efficiency of this engine
What will the temperature be when the ice cube has just melted. Use 4.184 J/K*g for the specific heat capacity of ice and water. If the water is then heated to 80 degrees C by burning methane (delta
A heat engine that is 58.6% efficient does 235.4 kJ of work. How much thermal energy input was required to perform this work
Predict whether a reaction will occur in each of the following. if so write the balanced chemical equation as well as the net ionic equation. Phases are all required for all species.
The armature of an ac generator is a rectangular coil, 2.0 cm by 6.0 cm with 80 turns. at what angular speed is the armature rotating
A ceramic coffee pot with m=116g and c=1090J/(Kg*k), is initially at room Temp(24 celcius). what is the equalibrium temerature of the sysytem
How much does it cost to cook food in a 12,000 W oven for 47.6 minutes? Assume electricity costs 8.0 cents per kW·h
The specific heat of water is 4.18 . Calculate the molar heat capacity of water. What mass of natural gas must you burn to emit 258 of heat