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A student sets up two reactions. Reaction 1 uses 0.190 mol/L of reactant, and Reaction 2 uses 0.470 mol/L of reactant. How many times faster is Reaction 2 compared to Reaction 1?
Assume the radius of a neutron to be approximately 1.0; times ;10^{ - 13} {rm cm}, and calculate the density of a neutron. [Hint: For a sphere V = (4/3)pi r^3.]
A canister is filled with 310 of ice and 100. of liquid water, both at 0 . The canister is placed in an oven until all the has boiled off and the canister is empty. How much energy in calories was absorbed?
175g of water was heated from 15 degrees to 88 degress celsuis. how many kilocalories were absorbed by the water?
Identifying an unknown hydrocarbon, Is it possible to identify what the hydrocarbon is with just knowing the volume of it (9.61 ml), the mass (7.669 g/ml), density (0.798 g/ml)?
What volume of CO2 gas is produced by the complete combustion of 2.6L (C3H8) gas? Assume all gas volumes are measured at the same temperature and pressure. C3H8 + 5O2 ---> 3CO2 + 4H2O
the power delivered to a photodetector that collects 8.0*10^7 photons in 3.8 ms from monochromatic light is 0.72 microwatt. what is the frequency of the radiation
titanium metal has a body-centered circle unit cell. The density of titanium is 4.50 g/cm^3 . Calculate the edge length of the unit cell and a value for the atomic radius of titanium.
Lead(II) phosphate, Pb3(PO4)2 (s), is allowed to come to equilibrium with its ions in otherwise pure water. Ksp = 3.0 x 10?44. Calculate the equilibrium concentration of each ion.
Use balanced equations to determine whether either CuBr or Ca3(PO4)2 has a different solubility with a change in pH:
how many no. of hydrogen ions are present in 10 millionth part of 1.33 cc of pure water at 25 degree celsius.
Calculate the density of N2 at STP, (a) using the ideal-gas law and (b) using the molar volume and molar mass of N2.
An industrial hygiene survey has been conducted to determine whether exposure of workers to ethyl benzene (molecular weight 106) exceeded the OSHA PEL of 100 ppm.
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