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Question: A lightning bolt may carry a current of 1.00 x 104 A for a short period of time. What is the resulting magnetic field 100 m from the bolt? Suppose that the bolt extends far above and belo
Calculate the heat of fusion of ice in cal/g and J/g given the following information: Initial water temperature= 51oC. Initial Volume of water = 25ml.
A student needs to react 0.228 mol Zn with hydrochloric acid. Calculate the minimum number of moles of HCl required, assuming all the zinc reacts?
What should be the index of refraction of a transparent sphere in order for paraxial rays from an infinitely distant object to be brought to a focus at the vertex of the surface opposite the point o
A falling sky diver reaches terminal speed with her parachute closed. After the parachute is opened, what parameters change to decrease this terminal speed?
What mass of NaOH (s) must be added to 1.0 L of 0.050 M NH3 to ensure that the percent ionization of NH3 is no greater than 0.0010%? Assume no volume change on addition of NaOH.
Assuming the temperature is constant, predict whether the change in entropy (delta S) is positive, negative or zero during the followings reactions.
You have a pure sample of 2-pentanol but discover that it does not rotate plane polarized light. The measurement of optical activity is done correctly. What is the most likely explanation?
Question: A 3.0 g bullet of specific heat 128 J/kg.degree C is moving at 180 m/s and enters a bag of sand then stops. If all kinetic energy is converted into heat, by what amount is increase in temp
SN1 substitution and E1 elimination frequently compete in the same reaction. (a) Propose a mechanism and predict the products for the solvolysis of 1-bromo-1-methylcyclopentane in ethanol.
Analysis shows that there are 2.50 moles of H2, 1.35 10-5 mole of S2, and 8.70 moles of H2S present in a 12.0 L flask. Calculate the equilibrium constant Kc for the reaction.
Determine the value of x, in dollars, that will make their weekly pay the same.
If the heat of combustion for a specific compound is -1180.0kj/mol and its molar mass is 26.93g/mol, how many grams of this compound must you burn to release 805.00 kj of heat.
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln k versus 1/T (in K) is linear and has a slope of -7445 K. Calculate the activation energy for the reacti
An aqueous solution of glycerol C3H8O3 is 48% glycerol by mass. Calculate the molality of the glycerol solution. (*Please show work so I can understand how to work it.)
The following equilibrium constants have been determined for hydrosulfuric acid at 25°C. Calculate the equilibrium constant for the following reaction at the same temperature.
Iodine Trichloride, ICl3, will react with a chloride ion to form ICl4 negative. Identify the Lewis acid and Lewis base. Use arrows to show movement of the electrons in the formation of the product.
You then stand, elevating your eyes by a height H = 1.70m, and stop the watch when the top of the Sun again disappears. If the elapsed time is t = 11.1 s, what is the radius r of Earth?
If 2.00 mol of hydrochloric acid reacts with 2.00 mol of strontium hydroxide, how many grams of strontium chloride will be produced?
Gloria had a rectangular garden plot last year with an with an area of 60 square feet. This year Gloria's garden plot is one foot wider and three feet shorter than last year's garden, but it has the
What is the redox number for nitrogen in a molecule of nitrogen dioxide and iron metal?
What is the heat change per mole of CaCl2 dissolved in water? Assume that all the heat is absorbed by the water (c = 4.18 J/g degrees C).
Find the distance between the particles at the moment when their velocity vectors are perpendicular to each other.
If the restoring spring of a galvanometer weakens by 25% over the years, what current will give full-scale deflection if it originally required 36 μA?
What is the expected boiling point of a solution that contains 25.0g of glucose, C6H12O6 in 250.0 g of H2O? ( Kbp = 0.51 degrees C/m)