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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)
For sodium atom the number of electrons with m=0 will be: (1) 2 (2) 27 (3) 9 (4) 8 Ans: 7
Explain Bromination of N-N-dimethylaniline Bromination of N,N-dimethylaniline is faster because nitrogen has an unshared electron pair that can stabilize the carbocation inter
How might temperature changes in the human body have an impact on human health
calculate the electrode potential of a platinum electrode immersed in a solution containing Ce4 + ions (cCe4 + = 0.05M) and Ce3 + ions (cCe3 + = 0.1M)
Explain DTA
Pick out the isoelectronic structures from the following : CH + 3 , H 3 O + NH 3 CH - 3 I
plzzzzzzz sir giv me some information about law of constant proportion my email id is [email protected]
Methods yielding mixture of amines - Hofmann's method Hofmann's method: The mixture of amines (1°, 2° and 3°) is made by the alkylation of ammonia along with alkyl halides.
Q. Show the diffrent kind of matter? Liquid matter has a specific volume like a solid but flows and takes the shape of its container. A liquid is incompressible for the reaso
Prepare an assignment on the topic commercial cells
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