Formaldehyde (CH2O) is made up of carbon, hydrogen, and oxygen. It is 40.0 % carbon by mass and 53.3% oxygen by mass. If the remainder is hydrogen only, then find the mass percentage for hydrogen in formaldehyde. Then, find the mass of each of the three elements in 7.55 g of formaldehyde. Show all of your equations, including all of the units and conversion factors. 40.0%+53.3%=93.3%

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Explanation:

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each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.