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A power company transmits current through a 240,000-V transmission line. This voltage is stepped down at an area substation to 40,000 V by a transformer that has 900 turns on the primary coil. How many turns are on the secondary of the transformer?
What is the age of a rock whose Argon 40 / Potassium 40 ratio is 1.55. The half life of Potassium 40 is 1.28 x 10^9 years.
Derive the simplest algebraic form of the error propogation equation to evaluate the uncertainty in D ehere D=(m2-m1)/(V2-V1)
mom made the kids 2 l of kool-aid by mixing 5.0 g sugar c12h22o11 10.2 mg of kool-aid powder a proprietary mixture of
Compute the theoretical yelled percentage of a reaction between sodium and water if 25.0 g of sodium react with excess water and is 15.5 L of gaseous hydrogen are collected at as well as TP conditions
The standard enthalpies of formation of SO3(g), S(g) and O(g) are -359.7, +278.8 and +249.0 kJ mol-1, respectively. Use these data to calculate the average bond energy (in kJ mol-1) of the S=O double bond.
A solution of a weak acid, HA, is prepared by dissolving 4.8 mmol of HA in 10.0 liters of a solution.The following values of absorbances were measured in a 1.0 cm cell in various buffers.
Explain how the atomic/molecular properties of the H2O can explain this statement: The temperature of liquid water rises and falls slowly. What accounts for the high degree of variability between different proteins?
A student collects 242mL oxygen in a gas collecting tube by water displacement. The water level inside the tube is 27.0mm higher than that ouside. The temperature is 294 K. The barometric pressure is 753 mmHg. What is the partial pressure of the d..
Calculate the pH in the reaction flask after 12.00 mL of 0.25 M NaOH titrant has been added to 25.00 mL of 0.52 M lactic acid, HC3H5O3, whose Ka = 1.4 x 10-4.
use the van der waals equation to calculate the pressure of 4.21L CO(g) at 300°C. (a= 1.472 bar L^2mol^-2 and b=0.0395L mol^-1)
The equilibrium constant, Kc for the reaction: Ni(s) + 4CO(g) Ni(CO)4(g) is 5.0 × 104 at 25°C. What is the equilibrium constant for the following reaction? Ni(CO)4(g) Ni(s) + 4CO(g)
Fill in the MO diagram for N2 (+). Im having trouble remembering how to use MO diagrams again and if you could explain how to use them I would be very grateful.
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