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Consider 100.0-g samples of two different compounds consisting merely of carbon and oxygen. One compound contains 28.4 g of carbon, as well as the other has 44.2 g of carbon. Explain how can these data support the law of multiple proportions if 44.2 isn't a multiple of 28.4?
Using words and pictures, explain why impurities usually lower the melting point of a substance. Next, imagine a case where an impurity actually RAISES the melting temperature of a pure substance
Starting with d-talose (you can find this in the book or online) draw the \(\beta\) -anomer of its pyranose Haworth structure.
A gas evolved during the fermentation of glucose ( wine making) has a volume of1.60 L when measured at 22.0 degree C and 1.00 atm. what was the volume of this gas at the fermentation temperature of 38.0 degree C and 1.00 atm pressure
The temperature increased by 10.08 oC. Use these data, plus the information given below for CO2 and H2O, to estimate the standard enthalpy of formation, of H, at 25 oC for this compound of H values at 25 oC for CO2(g) and H2O(l) are 394 kJ mol 1 a..
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x 10-11 mol/L. Is this solution acididc, basic, or neutral?
write a chemical reaction for this process. If a sample of the supernatant from the reaction above were used as part of a half cell along with a zinc electrode and the other half-cell was a standard hydrogen electrode, what is the potential of the..
How many different types of resonance structures can be drawn for the ion SO32.
which of the following would not be a suitable solvent for a grignard reaction and why? hexane methanol dimethyl ether
Oxalic acid (H2C2O4) is a useful primary standard for standardizing solutions such as potassium permanganate (KMnO4). In a particular standardization experiment 29.00g of oxalic acid, is titrated with 243.00mL of permangante solution
1.56 g of a gas dissolves in 2.00 L of water at a pressure of 1.75 atm. At what pressure will 2.00 g of the gas dissolve in 2.00 L of water if the temperature remains constant?
The rate of effusion of a particular gas was measured and found to be 24.0 mL/min. Under the same conditions, the rate of effusion of pure methane (CH4) gas is 47.4 mL/min. What is the molar mass of the unknown gas?
A 5 once cup of yogurt contains 6.0 g of protein, 2.0 g of fat, 26.9 g of carbohydrate. the fuel values for protein, fat and car. are 17.38 and 17 KJ/g respectively. The fuel values of this cup is how many KJ
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