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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?
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 cur
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.
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
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 pressu
3-Magnesium burns in air to form the magnesium nitride, Mg3N2 and magnesium oxide, MgO. Magnesium nitridereacts with water to give ammonia.
The track and field playing area is in shape of the rectangle with semicircles at each end. Inside perimeter (rectangle part) of track is to be 1200 meters. What must dimensions of rectangle be so
A solution is prepared by mixing the 90 ml of 5.00M HCL and 30 ml of 8.00M HNO3. Determine the added until the final volume is 1.00L. Determine H+ and OH- and the pH for this solution.
The resistor and an inductor are joined in series to the ideal battery of constant terminal voltage. At the moment contact is made with the batter, the voltage across the resistor be?
Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by in cineration. Even an empty can contains residual gaseous propellant.
A coil lies flat on the table top in an area where magnetic field suddenly grows stronger. If viewed from above, determine the direction of the induced current in this coil as the field reduces?
Suppose you are investigating a murder, the coroner determines the body temperature of cadaver and finds it to be 34°C.
A resistor L is located in series with resistor R. The combination is placed in parallel with the other resistor R and a DC battery having voltage E. The net current leaving the battery at the momen
Assuming all the steam is converted to water; explain what would be the final temperature of the system, the heat transferred from the water to copper, and the entropy change of the water, copper, a
Determine the total pressure of a mixture of 0.0335 mol of helium, He, and 0.0240 mol of oxygen, O2, in a 4-L flask at20°C.
The central bright fringe in the single slit diffraction pattern from the light of wavelength 542 nm is 1.8 cm wide on a screen which is 1.05 m from the slit.
Given the average rate of the reaction is found to be 4.50 × 10-4 M/s, explain how long will it take the concentration to drop to 0.340 M? In the reaction A → products, the initial c
Determine the initial angular velocity of the fly-wheel if, after two minutes, the flywheel is rotating clock-wise at 250 rad/sec and the acceleration of the fly-wheel is a constant 4 rad/sec^2, clo
Calculate the maximum height, neglecting all the forms of friction, to which a car of mass 1000kg can be driven on the 1 gallon fuel given that the engine cylinder temperature is 2000 Celsius and th
Determine the (i) x-component and (ii) y-component of the velocity of the third part? (iii) Determine how much energy is liberated in the explosion? Avoid effects due to the gravitational force.
Colony starts with 5 bacteria, but 5 hours after starting of experiment, it has grown to 230 bacteria. Write the formula for number of bacteria as the function of time.
On a day when the atmospheric pressure was29.85 in Hg, he trapped some air in the tip of a J-tube and calculated the difference in the height of the mercury in the two arms of the tube (h).
We wish to evaluate the times of flight of two light beams; one in a tank of carbon tetrachloride (n = 1.46), the other in air (n = 1.0). When the path lengths are made the same, determine how long
If 33.5 mL of the acid solution are needed to neutralize the 25.0 mL of the base solution, the concentration of the NaOH in moles/liter is? A standard solution of 0.154 M HCl is used to explain the
The magnetic field is perpendicular to a circular coil of 5 turns and diameter 20 cm changes from +1.85T to -0.25 T in 30ms. Determine the change in magnetic flux and induced emf?