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What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

The clouds are grey and ground is wet. a quantitative b qualitative

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?