Q-Science-Gr6-SQSA1-CBT (2020-21) Question: 1-12
Which of the following would be the best model to show the interactions between water and the Sun's heat energy in cycles of precipitation?
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The reaction 2kalsi3o8 + 2(h+ + hco3-) + h2o  →  al2si2o5(oh)4 + 2k+ + 2hco3- + 4sio2 shows that feldspar kalsi3o8 is chemically altered by hydrolysis to form chalky-looking clay mineral kaolinite al2si2o5(oh)4. the chemical breakdown of potassium feldspar due to exposure to acidic water results to the mineral binding with the water molecule to become kaolinite with silica and potassium and bicarbonate ions in solution.

The answer is a. stable, hope i ya

Copper does not react with dilute sulphuric acid as its reduction potential is higher than that of hydrogen

Answer:

correct answer is option c

226.73 kj

explanation:

based on the equation and the information in the table, when we theoretically calculate the enthalpy of the above reaction, the enthalpy of the reaction is 226.73 kj.