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Light from a star has an intensity of about 75.5×10-8W/m2. how far away is it from Earth
When an electric circuit is being assembled, a common practice is to twist together two wires carrying equal currents in opposite direction
The Born-Haber cycle is a series of steps that represent the formation of an ionic compound from a metal and a nonmetal. For example, the steps in a Born-Haber cycle for the formation of NaCl(s) con
A motor pulls a ski tow rope moving 10 skiers at a time (each 75kg) up a slope of 20 degrees at a constant 2m/sec speed. find the minimum power the motor must have to accomplish this
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule) A. SF4 > CF4 B. CO2 > SO2 C. CCl2F2 > CH2F2 D.
A section of hollow pipe and a solid cylinder have the same radius and mass. Which has the most rotational kinetic energy
Write the balanced equation. BaCl2(aq) + 2AgNO3(aq) ? 2AgCl(s) + Ba(NO3)2(aq) b. What mass of AgNO3, in grams, is required for complete reaction with 0.156 g of BaCl2? What mass of AgCl is produced?
Suppose that you are traveling on board a spacecraft that is moving with respect to the earth at a speed of 0.946c. calculate your breathing rate
The activation energy for the gas phase decomposition of difluoroperoxide is 72.4 kJ. F2O2 F2 + O2 The rate constant at 238 K is 8.04E-4 /s. The rate constant will be /s at 286 K.
You're standing in waist-deep water with your eyes 0.44 m above the surface. A fish is swimming 0.55 m below the surface. How far (horizontally) from you is the fish
The activation energy for the gas phase decomposition of trichloromethyl chloroformate is 174 kJ. ClCOOCCl3 2 COCl2 The rate constant at 551 K is 4.72E-4 /s. The rate constant will be 4.96E-3 /s at
A particle moves along the x axis. It is initially at the position 0.190 m, moving with velocity 0.250 m/s and acceleration -0.350 m/s2. Find the angular frequency of the oscillation
Which statement is true for a reaction with Kc equal to 2.43 × 10-12? A) Increasing the temperature will not change the value of Kc. B) There are appreciable concentrations of both reactants a
Pearson Brothers recently reported an EBITDA of $6.5 million and net income of $1.95 million. It had $2.21 million of interest expense, and its corporate tax rate was 35%. What was its charge for d
If Kc is the equilibrium constant for a forward reaction, 2 A? B, what is Kc´ for the reaction 4 A? 2B? A) Kc B) Kc C) 2 Kc D) (Kc)2
Estimate the value of the property using a DCF model with a discount rate and what is the value of the property to the nearest whole dollar?
Predict which of the following compounds has the greatest lattice energy. A. SCl6 B. AlCl3 C. NaCl D. MgCl2 E. PCl5
The decomposition of HI(g) is represented by the equation 2HI(g) H2(g) + I2(g) Kc= 64 at 25°C. If the equilibrium concentrations of H2 and I2 at 400°C are found to be [H2] = 5.0x10-4 M and [
Suggest one plausible reason for a % mass of water that is lower/higher than the true value
What is the concentration of hydroxide ion in a 0.27 M aqueous solution of hydroxylamine, NH2OH? Please be detailed on how Kb is found.
Need to create a cartoon strip, where you must represent all 10 cells.
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule)? A. SiCl4 > SCl4 B. PF3 > PH3 C. H2S > H2O D
Hydrogen iodide decomposes according to the equation: 2HI(g) H2(g) + I2(g) Kc = 0.0156 at 400°C. A 0.57 mol sample of HI was injected into a 2.0 L reaction vessel held at 400°C. Calculate th
Calculate the number of moles of Cl atoms in 1.81×1024 formula units of magnesium chloride,MgCl2 . Express your answer numerically in moles.
Calculate the per capita energy use for China and India. The populations of each country should be obtained from reliable sources. Express your final answer in units of kcal per day per person.