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Consider the combustion of methanol: 2 CH3OH(g) + 3 O2(g) 2 CO2(g) + 4 H2O(g). If CO2 is produced at the rate of 0.8 mol/s, what is the rate of consumption of O2?
For the gas-phase reaction shown below, choose the answer which indicates how the rate of change of H2O is related to the rate of change of C3H6.
At a certain concentration of reactants the rate of appearance of water in the following reaction is 0.43 M/s.
A snowboarder starts from rest and glides down a hill that is 100m high. Assuming no friction, what is her speed at the bottom of the hill
6HF + SiO2 => H2SiF6 + 2H2O Delta Hrxn = -670kJ/mol, What is the enthalpy change if the feed into a reactor contains 3 mol HF and 1.5 mol SiO2
A 4.9 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.6 ? 10-12 N. What is the gravitational potential energy of the two-particle system
How do I calculate the theoretical pH of a solution made of 25 mL 0.10 M acetic acid and 25 mL 0.10 M sodium acetate
A 3.80-kg cylindrical rod of length 2.00 m is suspended from a horizontal bar so it is free to swing about that end. What is the angular velocity of the rod immediately after the collision
The concentration of potassium ions inside a nerve cell is around 20 to 30 times that outside the cell. Calculate the potential difference between inside and outside a nerve cell, if it depends only
A large punch bowl holds 4.00kg of lemonade (which is essentially water) at 25.0?C. A 5.00×10?2-kg ice cube at -13.0?C is placed in the lemonade. What is the amount of ice (if any) remaining
Give the cell diagram notation of the electrochemical cell that could be used to determine experimentally the dissociation constant (Kw) of water. The standard reduction potential for
A jet plane passes over you at a height of 4990 m and a speed of Mach 1.75. Find the Mach cone angle
The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressure of oxygen:
Unpolarized light of intensity I0 passes through six successive Polaroid sheets each of whose axis makes a 40? angle with the previous one
Write the equation of the cell reaction and indicate cathode and anode half-cells for the electrochemical cell formed from a Mg/Mg^2+ half-cell and In/In^3+ half-cell.
The energy flow per unit time per unit area (S) of an electromagnetic wave has an average value of 601 mW/m^2
How much time is required to produce 200g of aluminum metal from molten aluminum oxide dissolved in cryolite, if you use a 12amp current
A cylinder rolls without slipping down an incline that makes a 57° angle with the horizontal. What is the acceleration of the cylinder
Calculate the number of moles of electrons needed to produce 5.12g of copper from the electrolysis of a solution of CuSO4.
Consider a merry-go-round that has the form of a disc with radius 5.4 m and mass 160 kg. If five children, what is the total moment of inertia
Give the balanced redox reaction for each possibility and explain your reason for selecting the reaction which will occur. Assume standard solution concentrations.
The excess internal energy of metabolism is exhausted through a variety of channels, such as through radiation and evaporation of perspiration. Calculate the rate at which you lose energy by exhaling
An unknown compound has a melting point of 121 - 122 °C. Melting point of a mixture of pure benzoic acid and your unknown sample was 116-122 °C. Melting point of a mixture of 2-naphthol and
An 800 kHz radio signal is detected at a point 9.5 km distant from the transmitter tower. Find the average electromagnetic energy density
using any diagrams that you wish to draw, explain how the Ocean Optics spectrophotometer works. Note: we are not asking how to operate the spectrophotometer.