Determine the enthalpy of formation for na
Determine the enthalpy of formation (ΔHo) for Na (Sodium in solid state)? Isn't it zero, because it's in its stable form? However, it looks like it's not zero. Can somebody confirm this?
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Calculate the molar heat capacity of benzene at the constant pressure? It takes 330 Joules of energy to raise the temperature of 24.6g of benzene from the 21.0°Cto 28.7°C at constant pressure.
Determine what would the elastic modulus of glass have to be to support the transmission of light waves at a speed of v = 2.21 x 108 m/s? (For comparison: the real elastic modulus of window glass is 5 x 1010 N/m2.)
A sample which is having 0.6911-g of impure strontium carbonate, SrCO3, is decomposed with the HCl. The resulting liberated CO2 is collected on the calcium oxide and weighs 0.1745 g.
For series circuits, let consider configurations having 3 resistors of no less than 1 ohm each. Show instance computations with a net voltage of no more than 15 volts. Determine the voltages and current across each resistor. Compute the electric e
Six people enter an elevator at first floor. The elevator starts going up and is going to stop at 9 floors. Supposing that each person is equally likely to get off at any of these 9 floors, what is the probability that at least 2 of the people wil
Calculate the concentration of Oxygen in the water when the oxygen is dissolved in the water with the total pressure of gas (Oxygen + water vapor) over the water being 3.20 atm. The temperature is 25 oC.
Statistics show that approximately 40% of all fatal automobile accidents involve drunk driving. Of the next 5 fatal car accidents on the highway of a city, the probability that 2 of the accidents were caused due to ddrunk driving:
A focused CO2 laser beam putting out a continuous wave (λ0 = 10,600 nm) of 3 kW is able of burning a hole via a quarter-inch thick stainless steel slab in around 10 seconds. Find out the irradiance if such a beam has a focused spot area of
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