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Biology and Chemistry Homework Help
Finding the formula of the metal
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[QUOTE="lioric, post: 6498162, member: 444862"] [B]Homework Statement:[/B] 0.1 mol of metal X (Ar = 27) was burned in oxygen to give an oxide with mass of 5.1g. What is the formula of the metal oxide if it has a relative molecular mass of 30? The choices are XO X2O3 XO2 X2O The answer says X2O But if I add up X2O the RMM is 70 not 30 [B]Relevant Equations:[/B] This question is confusing I don't understand how the RMM could be 30 I haven't gone into a solution cause I found this question confusing [/QUOTE]
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Biology and Chemistry Homework Help
Finding the formula of the metal
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