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1. A compound whose empirical formula is CH3 has a molar mass of 30 g/mol. What is its molecular formula? (3 points)
2. Find the molecular formula for each of the following compounds: (6 points) a) 30.5% nitrogen; 69.5% oxygen; molar mass of 46 g/mol NO2 N2O4 N3O6 N5O10 N7O14 b) 2.67 g of carbon; 0.22 g of hydrogen; 7.11 g of oxygen; molar mass of 90 g/mol Hint: Start by calculating the empirical formula. 3. A gas sample of 17.0 g is constituted of 15.8 g of carbon, the rest being hydrogen. Given that the sample?s volume is 4.9 L at NTP conditions, calculate the molecular formula for this compound.(5 points) 4. A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 ?°C and 90 kPa, find the molecular formula for this compound. (5 points) 5. A compound is constituted by mass of 52.1% carbon and 13.1% hydrogen, the rest being oxygen. Given that a volume of 5.33 L of this gas has a mass of 11.5 g at 13 ?°C and 110 kPa, find the molecular formula for this compound. (5 points)
why contradiction seems
Q. Show Applications of coordination compounds? Innumerable applications of coordination compounds in fields as divergent as biology, industry. Agriculture, analytical chemist
1. (a) Reacting Pt 2+ with two equivalents of each of the ligands NO 2 - and en, it is possible to prepare several complexes that could be described as both geometric and opti
The statements: (1) In filling a group of orbitals of equal energy, it is energetically preferable to assign electrons to empty orbitals rather than pair them into a particular o
what color about s-block oxide
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Q. Write phosphate conditioning method for water softening with suitable chemical reactions. How it is different from soda lime method. Ans. Phosphate condition
Free radical replacement reactions Free radical substitution reactions include the attack by a free radical. These reactions happen by free radical mechanism that includes Init
Examples of amperometric titrations
Flash point - Characteristics of Hydrocarbons The minimum temperature at which an oil provides enough vapours to form an explosive mixture with air is considered as flash point
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