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A compound composed of carbon, hydrogen and oxygen has a molar mass of 90.12 g/mol. If 2.25 grams of this compound is combusted in excess oxygen and 4.40 grams of carbon dioxide and 2.25 grams of water then what is the subscript for the carbon atom in the molecular formula for this compound?

4.00g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 60./gmol, is burned completely in excess oxygen, and the mass of the products carefully measured:

Use this information to find the molecular formula of X

Question 1. Design a DAC using inverting OPAMP for 3-bit binary value and verify the analog output for the same

Take: Rf=1MΩ

            R=1KΩ

            Vref= -5 V