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What method would you choose to find the rate of reaction between magnesium and hydrochloric acid? Explain why this method is better than four possible alternative.




Explain homogeneous and heterogeneous catalysis and give example of their application
A copper cube measuring 1.56 cm on edge and an aluminum cube measuring 1.66 cm on edge are both heated to 57.6 ∘C and submerged in 100.0 mL of water at 21.8 ∘C . What is the final temperature of the water when equilibrium is reached? (Assume a density of 0.998 gmL−1 for water.)
The optimum drinking temperature for a Shiraz is 15.0 ∘C . A certain bottle of Shiraz having a heat capacity of 3.40 kJ∘C−1 is 23.1 ∘C at room temperature. The heat of fusion of ice is 6.02 kJmol−1 and the heat capacity of ice is 2.108 Jg−1∘C−1. Assume that no heat is lost to the rest of the surroundings. What minimum mass of ice, originally at -6.0 ∘C , is required to bring the final temperature to 15.0 ∘C?
How many molecules of hydrogen gas are formed when 24.6 g of sodium are added to water. Show your work.
An atom y has an atomic number 13, it's 12th electron is found in which subshell
How many liters of NH₃, at STP, will react with 8.5 g O₂ to form NO₂ and water?
How many liters of NH₃ are needed to react completely with 16.0 L of NO (at STP)?
1. Calculate buffer pH after mixing 100ml of 1N NHuOH and 150ml of 2N NHuCl solution. How pH change after addition of 500ml of water. pK = 4.75

2. Calculate time of iodine (13.1) decomposition on 75% of T1/2 = 8 days

3. Write the Micelotta formula of sol formed by mixing 200ml of 0.1N AgNO3 and 10ml 1N
Calculate [H30+] and [OH-] for a solution eith pH=6.0
Complete and balance the following equation: Ni3(PO4)2+Ag2S
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