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How many moles of Ba(OH)2 are required to make 1.0L of solution in which the OH- concentration is 0.050M??Barium Hydroxidedissolves as follows:
A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.860 m/s at an angle of 34.2° above the table, and it lands on the magazine 0.075
Briefly explain the behavior that distinguishes substancesthat we call eletrolytes from non-electrolytes. Also discuss thedifference(s) in behavior between a strong electronlyte and a weak electroly
(a) with what upward velocity is the rock shot, (b) what maximum height above the top of the building is reached by the rock, and (c) how tall is the building?
Water drips from the nozzle of a shower onto the floor 203 cm below. The drops fall at regular (equal) intervals of time, the first drop striking the floor at the instant the fourth drop begins to f
The mass of a string is 9.0 x 10-3 kg, and it is stretched so that the tension in it is 240 N. A transverse wave traveling on this string has a frequency of 380 Hz and a wavelength of 0.78 m. What i
In order to get maximum calorific output, a burner should have anoptimum fuel to oxygen ratio which corresponds to 3 times as muchoxygen as is required theoritically for complete combustion of the f
Two wires are kept tight between the same pair of supports. The tensions in the wires are in the ratio 4:1, the radii are in the ratio 2:1. If the ratio of the fundamental frequencies 4:9 then find
Consider the normal freezing point of water. What are the signs(positive or negative) of ΔS and ΔH for the freezing of liquid water to form iceand what is the ratio of ΔH/ΔS
Assume that the aluminum wire has a rectangular cross section. The resistivity of aluminum is 2.82 x 10-8Ω-m
The following reaction takes place in a sealed 5.0 L flaskheld at 450 K. If both reactants begin at partial pressuresof 5.0 atm, what will the final partial pressure of CO2 be assuming that the reac
A 100 Ω resistor is connected to the battery. Determine the voltage applied to the resistor.
Sulfur 2.56g is burned at a constant volume calorimeter with excessO2 gas. The temperature increases from 21.25C to 26.72C. Thebomb has a heat capacity of 923J/K and the calorimeter contains 815gram
If downstream is the positive direction, an observer on shore determines the velocities of the two canoes to be -1.2 m/s and +2.9 m/s, respectively. (a) What is the velocity of the water relative to
Write equations for the preparation of the grignard reagent fromalkyl halide and for the reaction between the grignard reagent andthe carbonyl compound.
William Tell is said to have shot an apple off his son's head with an arrow. If the arrow was shot with an initial speed of 35.0 m/s and the boy was 19.5 m away. (Assume that the arrow and apple ar
The pilot of an airplane traveling 160 km/h wants to drop supplies to flood victims isolated on a patch of land 160 m below. The supplies should be dropped how many seconds before the plane is dire
For your science fair project you need to design a diffraction grating that will disperse the visible spectrum (400-700 nm) over 30.0 ^\circ in first order. A. How many lines per millimeter does you
Excess electrons are placed on a small lead sphere with a mass of 8.35 so that its net charge is -3.65×10^-9 . Find the number of excess electrons on the sphere.
Estimate the fraction of this power that is converted into the energy of sound waves. Assume the dimensions of the oven are 24.8 cm by 16.6 cm by 43.5 cm and the sound level is uniform over the oute
Determine (a) the period and frequency of the motion, (b) the amplitude, (c) The maximum acceleration, (d) the position, velocity and acceleration at t= 2s, and (e) Plot a position vs. time graph fo
Displacement vector points due west and has a magnitude of 1 km. Displacement vector points due south and has a magnitude of 2.4 km. Find the magnitude and direction (relative to due east) of the re
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 1.7 x 10-7 C/m2, and the plates are separated by a distance of 2.2
The earth's surface charge density (-1.0 x 10-9 C/m2) is roughly balanced by a net positive charge in the lower 10 km of the earth's atmosphere. What is the average volume charge density of this at
What would be the force on a charge of +14 microC placed at this spot?