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How much SO3 can be produced from 96.0 g of O2 and excess sulfur if the yield is 84.5%?
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of: a 1.50-mg mosquito moving at a speed of 1.40 m/s if the speed is known to within a + or - 0.01 m/s.
2,3,6-tri-O-methyl-D-glucose, 2,4-di-O-methyl-D-glucose and 2,3,4,6-tetra-O-methyl-D-glucose. The ratio of these sugars was 20:1:1. What is the structure of the polysaccharide?
How much heat is released when 40.0 g of steam at 250.0oC cools and condenses to water at 30.0oC?
In a beaker100 mL of 0.10 M HCl is added to 50 mL of 0.40 M KOH. Calculate the final concentration of OH- in solution after the reaction goes to completion.
A chilled steel rod at 2.00 is placed in the water. If the final temperature of the system is 21.4 , what is the mass of the steel bar?
A reaction at 2.35 atm produces 18.4 L of a gas and evolves 84.1 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ)
Iron reacts with oxygen in the air to produce rust, Fe2O3, according to the reaction shown below. 4 Fe + 3 O2 → 2 Fe2O3 How many moles of rust can be formed if 1.8 moles of iron are present?
Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a =2.300 L^2 x atm/mol ^2 and b=0.0430 L/mol.
Consider the following covalent bond radii. What is the approximate length of the CN bond in OC(NH2)2 (urea) using the table values?
If this particular monoclonal antibody precipitates with its antigen in a 1:1 ratio, how many milligrams of insulin must be added to the reactor per hour to process 100ml of mouse serum per hour.
To determine the concentration of SO42- ion in a groundwater 100mL of the sample is titrated with 0.0250 M Ba(NO3)2 forming insoluble BaSO4. If 4.51mL of Ba(NO3)2 solution is required to reach the e
What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.140m, assuming no change in blood volume?
How much energy in kJ is required to heat a calorimeter whose heat capacity is 408.3 J/oC from 23.5oC to 68.1oC?
General chemistry lab Grand Central equation Should chemists prepare zinc iodide, from its elements or from a double replacement reaction between barium iodide and zinc sulfate?
Carbon monoxide is toxic to humans at high concentrations. At an atmospheric pressure of 0.984 atm and temperature of 23°C, what is the partial pressure of CO at the toxic concentrat
A spoon was silver plated electrolytically in a AgNO3 solution. If 0.750g of Ag was deposited on the spoon at a constant current of 20.0mA, how long in hours did the electrolysis take?
Given that information, at what depth would the same one-square-meter column of water extend to achieve another 1 atm pressure ?
The general formula H3A with the following ionization constants: K1 = 1.0×10-3, K2 = 1.0×10-8, K3 = 1.0 × 10-12. Which species is present in the lowest concentration in 0.10 M H3A
Simon had a porch faucet that leaked 2.5 L of water on his front porch and froze into a puddle. He sprinkled 100.0 g of NaCl on the ice, and he was pleased to see it melt. However, it was still wint
What mass of magnesium, in reaction with an excess of hydrochloric acid, is needed to produce 128ml of hydrogen(H2) gas?
In the gas phase, the base strength of amines increases regularly along the series NH3<CH3NH2<(CH3)2NH<(CH3)3N. Discuss the role of steric effects and the electron donating ability of CH3 i
Consider 4.70L of a gas at 365 mmHg and 20. °C . If the container is compressed to 2.80L and the temperature is increased to 32°C , what is the new pressure, P2, inside the container? Assume no chan
A student calculates the density of iron as 6.9 g/cm3 using lab data for mass and volume. A handbook reveals that the correct value is 7.41 g/cm3. What is the percent error?
When 35.0 mL of 0.400 M hydrochloric acid and 35.0 mL of 0.400 M sodium nitrite are combined,what the pH of the resulting solution will be :