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Percentage formula of oxygen in

I have an exam in a day and I'm confused on how to solve this question. Do I use PV=nRT? Do I find out the molecular formula of
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2. asked by Jenny
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Percentage formula of oxygen in sodium trioxonitrate(v)
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2. asked by Precious
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Calculate the emperical formula of the following compounds from their percentage: calcium 74.45%, oxygen 28.55%
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2. asked by Anonymous
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what does an -ite or -ate ending in a polyatomic ion mean? i'm thinking it mean Oxygen is in the formula, or is it Sulfur is in
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2. asked by Dennis
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15.2g of sample Y were burned and a mass of CO2 in H2O results in 22.0g and 13.5g respectively.what is the empirical formula of
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2. asked by Sannu Xeno
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calculate the empirical formula. A chemist heats 50.00g of sulfur under controlled conditions to produce a sulfer-oxygen
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2. asked by Ash
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An organic compound on analysis gives the following percentage composition of elements present. Carbon 61.85%,hydrogen 10.50%
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2. asked by Angel
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Calculate the empirical formula and molecular formula of a compound that contains only carbon, oxygen and hydrogen and has a
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2. asked by Anonymous
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(white Powder) : 42.2% carbon, 6.4% Hydrogen, and 51.4% Oxygen Formula Mass = 342.2965 amuMolecular Formula: Empirical Formula:
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2. asked by Emily
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When 1.63 g sample of an unknown hydrocarbon is completely burned in oxygen, 4.97 g of CO2 are produced. What is the percentage
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2. asked by Alex
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