Posted by Olga on Friday, October 8, 2010 at 1:31pm.
Convert 55 g CO2 to grams C.
Convert 30 g H2O to grams H.
Calculate grams oxygen = 25- g C - g H.
Convert grams to moles.
moles C = g C/atomic mass C.
moles H = g H/atomic mass H.
moles O = g O/atomic mass O.
Now you want to determine the ratio of these elements to each other with the smallest number being 1.00. The easy way to do that is to divide the smallest number by itself (thereby assuring yourself that will be 1.0000), then divide the other two numbers by the same small number. Round to whole numbers. Post your work if you get stuck.
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