Search & Filtering
helium gas is collected over water at 25 degrees C. What is the partial pressure of the helium given that the atmospheric pressure is 750.0 mmHg
The final pressure, temperature, and volume of a gas sample is 2.0 atm, 25 °C, and 515 mL, respectively. What is the original volume of the gas if the original temperature and pressure were standard temperature and pressure (STP)?
Some acids such as hydrochloric acid are described as strong acids. Some acids such as ethanoic acid are described as weak acids.
(a) (i) Explain the difference between a strong acid and a weak acid.
Og of aluminum reacts with 18.o gas of chlorine gas to produce aluminum chloride which reactant is limiting which is in excess? balanced equation Al+3Cl2 2AlCl3
Calculate the wavelength of a particle with masses 9.11x10-31Kg travelling at speed 1.0x107 m/s and that of a ball of mass 0.1Kg travelling at 35 m/s. Comment on the significance of the wavelengths calculated.
Determine if it is Spontaneous or non-spontaneous and determine its direction.
Calculate the ∆H° and ∆S° for the following reaction.
NH4NO3(s)+H2O(I)—> NH4+(aq)+N0-3(aq)
Determine if it is Spontaneous or non-spontaneous and determine its direction.
Calculate the ∆H° and ∆S° for the following reaction.
NH4NO3(s)+H2O(I)—> NH4+(aq)+N0-3(aq)
Determine the order of the reaction with respect to N02-(show solution)
NH4+(aq)+N02–(aq)—>N2(q)+2H20(q)
The mineral chalk, which is made up of CaCO3 can be prepared by the reaction of solutions of CaCl2 and Na2CO3
a. Write the balance chemical equation
b. What volume of 0.500 M CaCl2 and 0.250 M Na2CO3 must be mixed to precipitate 8.51 g of CaCO3 ?
a sample of carbon dioxide occupies a volume of 3500 mL at 125 Kpa pressure. What pressure would the gas exert if the volume was decreased to 2.00 liters?
