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What is the heat of combustion of 12.4g of methane if change in H for the reaction as written below is -804kJ?
CH4 + 2O2 yields CO2 + 2H2O
A compound is composed of elements C, H, and N. A 7.875-mg sample of the unknown compound was combusted, producing 21.363 mg of CO2 and 6.125 mg of H2O. What is the empirical formula for this compound? (Type your answer using the format CxHyNz for..
Four atoms are arbitrarily labeled W, X, Y, and Z. Their electronegativities are as follows: W=4.0, X=3.0, Y=2.0, and Z=1.5. If the atoms of these elements form the molecules
A compound has an empirical formula of C2H2O and a molecular mass of 168.0. The molecular formula is C6H6O3.
If the volume of the gas sample is decreased to 15.3 L holding the temp constant, the average molecular speed will increase, decrease or remain the same?
The mercury level in the open to atmosphere end of the manometer was 5.25 cm lower than the hydrogen gas end. The barometer reading was 27.55 in Hg, Compute the gas pressure in torr
The combustion of liquid ethanol produces carbon dioxide and water. After 5.8 of ethanol (density = 0.789 ) was allowed to burn in the presence of 12.5 of oxygen gas, 3.10 of water (density = 1.00 ) was collected. Determine the percent yield for t..
A certain first order reaction is 47% complete in 45 seconds. What are the values of the rate constant and the half-life for process
A mixture of three gases, A, B, and C, is at a total pressure of 9.38 atm. The partial pressure of gas A is 1.88 atm and that of gas B is 2.32 atm. What is the partial pressure of gas C?
determine the final pressure volume temperature and number of moles of gas when the volume is reduced by halfnbspat the
Calculate the ratio of the effusion rate of oxygen (O2) to that of carbon dioxide gas (CO2). Express your answer in decimal form and calculate your answer to at least four sig figs.
Question- Write the types of radiation observed in the electromagnetic spectrum going from high to low energy. Also include what types of process occurs in atoms or molecules for each type of radiation
What is the composition of the buffer to begin with, both in terms of the concentration and the molar quantity of the two major phosphate species
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