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A compound of arsenic as well as fluorine is a gas. Explain a sample weighing 0.100g occupies 14.2mL at 23 C as well as 75 mmHg. Explain what is the molecular weight of the compound?
A reaction with the activation energy Ea= 219.00 kJ/mol, has a rate constant k = 2.400 x 101 at 565.00 Kelvin. Determine the rate constant when the temperature is changed to 861.00 Kelvin. R = 8.314 J K-1mol-1
Identify three radioactive elements or reactions of different types and write the nuclear reaction for each element.
Iodine-131 is a radioactive isotope. After 9.00 days, 46.0% of a sample of 131I remains. What is the half-life of 131I
describe the preparation of 400 mL of a solution that is 0.0500 M in I-, starting with MgI2.
The two rings are heated to 66.1 C and dropped into a 15.0 mL of water at 20.5 C. When equilibrium is reached, the temperature of the water is 22.5 C. What is the mass of gold ring. (Assume a density of 0.998 g/mL for water.)
Estimate the minimum boiling point difference betwen two compounds that would allow effective seprartion of the two compounds by simple distillation.
What is the pressure of a 10g sample of sulfur trioxide in atmospheres at a temperature of 20 degrees Celsius that has a volume of 50L
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places. Enter scientific notation as 1.23E4.
what is the relevance of half filled and completely filled orbitals in ionisation enthalphy ditermination.
How much heat is associated with the burning of 3.52 g of methane in the following unbalanced reaction: CH4(g) + O2(g) ?CO2(g) + H2O(g)
In the reaction below, 3.84 atm each of H2 and Cl2 were placed into a 1.00 L flask and allowed to react: H2(g) + Cl2(g) 2 HCl(g) Given that Kc = 62.1, calculate the equilibrium pressure of HCl.
Air has a density of about 1.2 kg/m3. One standard atmosphere (1 atm) is about 105 Pa. Assuming that the density of air remained constant as altitude increased, how high would the Earth's atmosphere have be to create a pressure of 1 atm
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