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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)
Q. Write short note on "Electrically conducting polymers". Ans. electrically conducting polymers: Many synthetic organic polymers have been found to possess high electrical c
Preparation of benzaldehyde by etard''s reaction
Name: Cyclohexane Formula: C6H12 Molar mass: 84.16 g/mol Density: 779.00 kg/m³ As it''s density is less than that of water, it floats on water rather than sinking.
explain resonance with examples.
the dug known as LSD has the formula C20H25N3O.one suspected sample contained 74.7%C,7.95%H,9.99%N.calculate the theoretical percentages to four significant figures
Dessicants(drying agents) can often be regenerated by heating. A dessicant that is commonly regenerated is CaSO 4 .2H 2 O:
Q. Determine the moisture content in flour? After undertaking this activity, you will be able to: • assess the moisture content in the given sample of flour, • determin
State 2nd law of thermodynamics in many forms as possible and show that they are identical in figures?
Which kind of volcano is the most destructive? Well each type of volcano can be very destructive and if you are talking in human loss of life terms than the answer is any type
Q. Requirements for the evaluation process? Some of the requirements to be kept in mind for the evaluation of the products are listed herewith: • People in a sensory test a
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