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Calculate the volume of oxygen you would need, at 1.00 atm and 298 K, to completely oxidize 54 g of glucose.
Why is my hydrogen peroxied based iodine clock zero order with respect to sulphric acid the acid is 0.05moldm-3 and I use 25cm3 of it diluted down to 41cm3
How many grams of water can be cooled from 45^circ {rm C} to 20^circ {rm C} by the evaporation of 65 {rm g} of water?
Apply the variation function x^2(a-x)^2 for x between 0 and a, to the particle in a box and estimate the ground state energy, E_gs. Explain why the function x^2 between 0 and a cannot be used as a
A sample of argon gas occupies 125 L at 22C and .975 atm. What volume will it occupy at 60C and .825 atm?
The fired crucible is handled with (oily) fingers before its mass measurement. Subsequently in Part B.1, the oil from the fingers is burned off. How does this technique error affect the reported per
A proton in a linear accelerator has a de Broglie wavelength of 128 pm. What is the speed of the proton?
Write net Brønsted equation for lithium dihydrogenphosphate with a pH = 4.70
In a particular titration experiment a 25.0 mL sample of an unknown monoprotic acid required 30.0 mL of .200 M NaOH for the end point to be reached. What is the concentration of the acid?
How much heat (in kJ) is required to warm 11.0g of ice, initially at -10.0 C, to steam at 108.0 C? The heat capacity of ice is 2.09 J/gC and that of steam is 2.01 J/gC.
A sample of ideal gas at room temperature occupies a volume of 23.0l at a pressure of 232torr . If the pressure changes to 1160torr , with no change in the temperature or moles of gas, what is the n
Assume that a gold atom is shaped like a sphere. An atom of gold has a radius of 156 pm and a mass of 197 amu. Determine the density of a single gold atom in units of g/cm3. (1 amu = 1.66 x 10-24g)
A 486 mL sample of water was cooled from 50.0°C to 10.0°C. Assuming a specific heat of 4.184 J/K g and a density of 1.00 g/mL, find the amount of heat transferred from the water to the surro
To obtain the same antifreeze protection requires 76 of propylene glycol to replace each 62 of ethylene glycol. Calculate the mass of propylene glycol required to replace 7.00 of ethylene glycol. Th
At equilibrium, the concentration of A is 0.381 M and that of B is 0.154 M. What is the value of the equilibrium constant, Keq?
An equilibrium mixture at this temperature contains equal concentrations of bromine and chlorine, 0.022 mol/L. What is the equilibrium concentration of BrCl?
If, in a certain experiment, over a specific time period, 0.0033 mol PH3 is consumed in a 1.5-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
A 309 mL sample of unknown HCl solution reacts completely with Na_2CO_3 to form 10.1 g CO_2. What was the concentration of the HCl solution?
In a certain experiement, 4.6 g Al is reacted with excess oxygen and 6.8 g of product is obtained according to this reaction: 4 Al = 3 O2 --> 2 Al2O3 What is the theoretical yield for this reacti
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and nonbonding electrons. Show the formal charges of all atoms in the correct stru
How much heat is needed to melt 1050g of the unknown at 510k. the melting point of the solis unknown is 670k and the boilding point is 800k.
How many grams of Cu metal (63.55 g/mol) will be plated out of a Cu(NO3)2 solution by passing a current of 3.00 amperes for 11 minutes?
A researcher plans to compare two treatment conditions by measuring one sample in treatment 1 and a second sample in treatment 2. Briefly explain how the difference simply may be sampling error.
A 4.10 g nugget of pure gold absorbed 278 J of heat. What was the final temperature of the gold if the initial temperature was 25.0°C? The specific heat of gold is 0.129 J/(g·°C).
A perfect percent yield would be 100%. For each reaction, comment on your degree of accuracy and suggest possible sources of measurement error. How could these errors be reduced in the future?