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Glory2ManU
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1) An 8g of sample of oxygen gas O2, contains the same number of molecules as 40g of a reddish brown solid X2. What is the relative atomic mass of X?
2) 124g of phosphorus vapour has the same volume as 71g of chlorine gas Cl2 at the same temperature and pressure. What is the formula of a molecule of phosphorus?
3) The gaseous hydride of a certain element X has a chemical formula of XH4. At room temperature, 7.2dm^3 of this hydride has a mass of 9.6g. What is the relative atomic mass of X?
2) 124g of phosphorus vapour has the same volume as 71g of chlorine gas Cl2 at the same temperature and pressure. What is the formula of a molecule of phosphorus?
3) The gaseous hydride of a certain element X has a chemical formula of XH4. At room temperature, 7.2dm^3 of this hydride has a mass of 9.6g. What is the relative atomic mass of X?