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Calculate and prepare the necessary volume of 0.1 M NaOH that will be sufficient for all the solutions. Using NaOH pellets, prepare a 100 μg/ml (ppm) vanillin stock solution in 0.1 M NaOH using a
The pH of a 0.75 M aqueous solution of a weak base, B, at 298 K is12.4. What percent of the base has reacted? i.e. what is the percent ionization of this base?
Calculate the amount of cupric nitrate tihydrate (molar massof 241.60 gram/mole) required to prepare each standard listedbelow. Note: The standards are to be prepared in terms of Cu.Remember that co
The coefficient of kinetic friction between the two blocks is 0.300, and the surface on which the 8.00 kg block rests is frictionless. A constant horizontal force of magnitude F=10.0 N is applied to
Formic acid has molar mass of 46.03 g/mol and is composed of 26.1%C, 4.38% H and 69.52% O by mass. What is the molecular formula for this substance (list elements in the formula in the same order as
The atmospheric sulfur dioxide (SO2) concentration over a certain region is 0.12 ppm by volume. Calculate the pH of the rainwater due to this pollutant. Assume that the dissolution of SO2 does not a
find the apparent weight of a 54-kg person in the roller coaster as it passes over the top of the hill. The apparent weight is how heavy the person feels, which is determined in this case by the nor
A girl stands on a rotating merry-go-round, 2.3 m from its center. If the girl has a speed of 2.2 m/s, what is the minimum coefficient of static friction between her feet and the merry-go-round that
(a) What is the angular speed (the magnitude of the angular velocity) of this bacterial motor? (b) How long does it take the motor to make one revolution?
A 0.30 kg toy is attached to the end of a horizontal string and rotated in a circle of radius 1.6 m on a frictionless horizontal surface. If the string will break when the tension in it exceeds 56 N
4.38-g sample of bromine was reacted with oxygen to form anoxide with a mass of 10.0 g. Calculate the percent composition of the compound
(a) What is the initial angular velocity of the turbine? (b) How much time elapses while the turbine is speeding up?
A gymnast is performing a floor routine. In a tumbling run she spins through the air, increasing her angular velocity from 2.70 to 4.60 rev/s while rotating through one half of a revolution. How muc
Calculate the concentration of vanillin in the imitation vanilla extract in mg/ml and find the total mass of vanillin (ing)in one bottle, (one bottle - 8 fluid oz.) Assume the density = 1.00 g/ml
A jar of salsa sits on a wheel that is turning at 22 rpm (revolutions per minute). If the jar sits 42 cm from the center of the wheel, what is the acceleration of the jar?
What is the average angular velocity of one of the mandibles of the trap-jaw ant when the mandibles snap shut?
Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other.
The smooth frictionless inclined surface makes an angle of ? = 31° with the horizontal, and the block on the incline has a mass of 5.7 kg. The mass of the hanging block is 2.37 kg. Find the magn
A large storage tank, open to the atmosphere at the top and filler with water, develops a small hole in its side at a point 16m below the water level. if the rate of the flow of water from the leak
How do you calculate the percent yield of a product from H-NMR peaks? Not using any other method, they are not available. The only information we have now is the H-NMR's we ranof our products.
A negative charge of -3 x10^-6C and a positive charge of 4.0 x10^-6 C are separated by a distance of 3 mm. What is the force on the negative charge? (magnitude and direction). A. what is the force o
The battery is removed. The fully charged capacitors are connected to each other such that terminals of opposite sign are joined together. Afterwards what is the equilibrium voltage across one of th
The solubility of compound X in water is208 g X/100g of water at 15 C. A solution of X in water at 35 C is made by dissolving 324g in 100g of water. When the water is slowly cooled to 15 C, no perci
A geothermal power plant uses geothermal water extracted at 150°C at a rate of 210 kg/s as the heat source and produces 8000 kW of net power. The geothermal water leaves the plant at 90°C. I