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Write a mathmatical expression for the displacement of the string particles, knowing their maximum displacement is 0.01m
Hydrogen from the decomposition of water has been promoted as the fuel of the future. What mass of water, in kilograms, would have tobe electrolyzed to produce 125kg of hydrogen?
If one micrometeorite (a sphere with a diameter on the order of 1.7 x 10^-6 m) struck each square meter of the Moon each second, estimate the number of years it would take to cover the Moon with mic
Assume that 50.0 mL of 0.100 M HCl was added to 125mL of 0.100M sodium Acetate. Is the resulting solution a buffer?Why or whynot? Calculate the pH of the resulting solution.The Ka for aceticacid is
What is the dielectric constant of the fluid? The capacitor is disconnected from the battery and then the fluid is removed. What is the new potential difference between the plates (in terms of V)
A mixture of sodium salts may contain one or more of the anions(Cl-, I-, SO42-, NO32-,PO43-) . All of the salts are readily andcompletely soluble in cold water. Two samples of this aqueoussolution s
The speed of an object & the direction in which it moves constitute a vector quantity known as the velocity. An ostrich is running at a speed of 15.6 m/s in a direction of 42 degrees north of we
The solubility of benzoic acid in water is6.8g/100mL at 95 C and 0.3g/100mL at 25 C. You are given 10g ofbenzoic acid. Calculate the amount of water that you would use to recrystallize the sample.
An electron is shot upward directly perpendicular to the lower plate of a parallel plate capacitor. Its initial velocity is 3.0 x 104 m/s. What must be the potential of the upper plate if the electr
Two charges are placed on the x axis: a +6.00 µC charge at x = 80.0 cm and a -3.00 µC charge at x = 0. Find E (electric field) on the x axis at (a) x = 30.0 cm and (b) x = 100.0 cm
At the beginning of a titration to standardize the NaOHsolution, Student A adjusted very carefully the initial burettevolume to 0.00 ml. But he did not notice an important air bubble atthe tip of th
Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 250 for 20 , then travels at con
What is the vapor pressure of a 45.0% solution of glucose,C6H12O6, at 90oC, given that the vapor pressure of pure water at that temperature is 526mmHg.
Knowing that the density of water is 1000 kg/m^3 she determines the density of the material of the necklace. Then she looks in her textbook to compare her answer to the density of gold which is give
Explosives are used to blow a rock apart. The explosion blows the rock into three fragments. Two fragments go off at a 107 degree angle to each other--a 3.9 kg piece at 24.2 m/s and a 6.2 kg piece a
Using phosphoric acid, what is the pH of the solution if u add 1.524g of phosphoric acid to enough water to make 100.0mL of solution? Using pka of acid are 2.16, 7.21, and 12.32 each.
Thionyl chloride, SOCl2, is used as a very powerfuldrying agent in many synthetic chemistry experiments in which thepresence of even small amounts of water would be detrimental.
Although we usually think of substances as "burning" only in oxygengas, the process of rapid oxidation to produce a flame may alsotake place in other strongly oxidizing gases.
Thiamine hydrochloride(C12H18ON4SCl2) is awater soluble form of thiamine (vitamin B1; Ka=3.37 X 10^-7). How many grams of the hydrochloride must be dissolved in 10.00 mL ofwater to give a pH of 3.20
0.300 moles of an unknown monobasic weak acid are added to 1.20 L of water. The resulting solution has a pH of 8.800. What is the Ka of the conjugate acid of the unknown base? Assume no change in vo
The frequency of the siren sound she hears is 8.5 hz, and as soon as the car passes her by, the frequency of the siren sound she hears becomes 75 hz. Knowing that sound travels through air with the
A 15 m long string, of mass 1.8 kg is streched such that the tension in the string is 25 N. A wave of frequency 20 Hz is sent through the string, and is traveling to the left. A.) Find the speed of
You want to make the buffer but you find you are out ofsodium dihydrogen phosphate so you must start with phosphoric acid.What is the pH of the solution if you add 1.524g of phosphoric acidto enough
A 0.5kg block at rest on a table is attached to a horizontal spring with a spring constant k=200 N/m. The spring is initially unstretched. A constant horizontal force of 20 N is applied to the bloc
One biochemical reaction has a standard Gibbs energy of-200kJ/mol and a second biochemical reaction has a standard Gibbsenergy of -100kJ/mol at the same temperature. What is the ratio of their equi