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Calculate the mass of magnesium needed to generate 80.0 mL of H2gas. Assume a temperature of 22.0 °C and a pressure of 760.0 Torr.Mg + 2 HCl -> MgCl2 + H2
A frictionless stick of mass m and length L lies at rest on a frictionless horizontal table. A mass km (where k is some number) moves with speed v0 at a 45 degree angle to the stick and collides ela
If the paradichlorobenzene sublimes, how will this affectthe calculation of the molar mass of your unknown? Explain why the freezing point of a pure solvent hasa "plateau" instead of a continuous down
The system is released from rest. If there is no slipping between any of the surfaces, what is the acceleration of the board? Use conservation of energy.
A train pulls away from a station with a constant acceleration of 0.49 m/s2. A passenger arrives at the track 5.0 s after the end of the train passed the very same point. What is the slowest constan
A student dissolve 1.00 gram of product in 50ml H2O. the di stribution coeffcient of the compound in ether and H2O is five. how much of the student's compound will be extract by one 60ml portion of
Suppose the wind speed in a hurricane is 107 mph. (a) Find the difference in air pressure (Pa) outside a home and inside a home (where the wind speed is zero).
A metallic sphere has a charge of +3.8 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 7.9 109 electrons are transferred. What are the charges of the sphere a
A car horn emits a frequency of 400 Hz. A car traveling at 20.0 m/s sounds the horn as it approaches a stationary pedestrian. What frequency does the pedestrian hear? The speed of sound in air is 3
What is the magnitude of the (net) force of the floor on the beam? What is the minimum value the coefficient of static friction between beam and floor can have in order for the beam not to slip at th
0.9 moles of an ideal gas with Cv = 3R/2, initially confined to a container of volume 6 litre and at a temperature 42 C, expand (or are compressed) against a constant external pressure of 1.2 atm un
Friction prevents the rod from sliding off the supports. Find the normal force exerted on the rod by the lower support. The acceleration of gravity is 9.81 m/s2 . Answer in units of N.
If a solution of glucose 1-phosphate is incubated with acatalytic amount of phosphoglucomutase, the glucose 1-phosphate istransformed to glucose 6-phosphate.
Two aluminum rods A and B are such that rod A has twice the length of rod B when they are at the same temperature. They are heated such that rod B experiences twice as great an increase in temperat
A 25 mL sample containing Cu2+ gave an instrumentsignal of 23.6 units (corrected for a blank). When exactly 0.5 mLof 0.0287 M Cu(NO3)2 was added to the solution, the signal increased to 37.9 units.
A geochemist is interested in studying the extent of ocean dilution of trace components due to melting glaciers. If normal seawater has a pCa2+ of 5.611 and the projected effects of melting glaciers
Calculate the quantities of reagents needed to prepare 1.0 L ofdisodium arginine-sodium arginine buffer solution at a pH of 4.5.You are given DI water, disodium arginine and sodium hydroxidesalts.
You travel in a spacecraft with a speed of 0.2 c. Your atomic watch (light clock) tells it takes 1 year to reach your space station from the earth. What do you see the time spent from a light clock
A test charge of -5.0 X 10-7 C is placed between two other charges so that it is 50 mm from a charge of -3.0 X 10-7 C and 10 cm from a charge of -6.0 X 10-7 C. The three charges lie along a strai
Experimental data indicates that 0.12 moles of glycerol are form edfor each mole of ethanol produced and that 0.08 moles of water are formed for each mole of glycerol.
What is the magnitude and direction of the net electrostatic force acting on the charge at the center?
What are (a) the magnitude and (b) the angle of the vector A + B + C, and (c) the magnitude and (d) the angle of A-B+C? What are the (e) magnitude and (f) angle of the fourth vector D such that (A+B
Calculate the standard free energy change for the following metabolically important enzyme-catalyzed reaction at 25°C andpH 7 using the indicated equilibrium constant: glyceraldehyde 3-phosphate
A transverse wave on a string has an amplitude A. A tiny spot on the string is colored red. As one cycle of the wave passes by, what is the total distance traveled by the red spot?
TheΔH and ΔS for the the reaction catalyzed by argininekinase were determined to be -8.2 kJ/mol and 2.2 J/K/mol,respectively, at 37° C. What is the ΔG? Comment on whether &Delt