Se disuelven 15 gramos de carbonato de sodio de 140 gramos de agua, luego se le añaden 50 ml de solución de 40% m/m y densidad de 1,7 g/ml. Determina la nueva % m/m de la solución resultante

The answer is a) carbon-12

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck

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 to your q it is false