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2-Methylpentane and 4-methyl-2-pentanone are constitutional isomers with the molecular formula C6H12O.each shows a molecular ion peak in its mass spectrum at m/z 100. Spectrum A shows significant peaks at m/z 85,58,57,43,42. Spectrum B shows significant peaks at m/z 71,58,57,43,29. Assign each compound it's correct spectrum?
A 275.0 mL sample of O2 is collected over water at 60.0 degrees Celsius. The total pressure is 755 torr. What is the volume of the O2 at STP? (The vapor pressure of water at 60 degrees Celsius is 149 torr)
A helium-filled balloon has a volume of 2.75 L at 17 C. The volume of the balloon decreases to 2.36 L after it is placed outside on a cold day. What is the outside temperature in K?
Nitrosyl chloride (NOCl) decomposes at elevated temperatures according to the equation 2NOCl(g) ->2NO(g) + Cl2(g). Calculate Kp for this reaction at 680°C. (For this reaction ΔH° = 81.2 kJ/mol, ΔS° = 128 J/K·mol)
When 1.33 mol of HCl reacts with excess MnO2, how many moles of Cl2 form?
The density of titanium metal is 4.51g/cm3 at 25 degrees celsius. What mass of titanium displaces 125.0mL of water at 25 degrees celsius.
It is found for the reaction A + B > C that doubling the concentration of either A or B while keeping the other one constant quadruples the reaction rate. Write a rate law for the reaction
A tank of hydrogen has a volume of 22.9 L and holds 14.0 mol at 12.0 C, what is the pressure of the gas in atm
The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride produced 36.5 {rm g} of sodium upon decomposition. How much fluorine (in grams) was formed?
Calculate the molar solubility of FeCO3 . How many grams of FeCO3 are present in 15.0 L of a saturated solution.
Solid aluminum reacts with aq H2 SO4 to form H2 gas and aluminum sulfate. when a sample of Al reacts, 425 mL of H2 gas is produced at 24 degree celsius at a press of 744 mmHg. How man grams of Al reacted?
How many grams of Ca(OH)2 are needed to neutralize 3.6 moles of HCl in 655 mL of solution? The molar mass of HCl is 36.46 g/mol. The molar mass of Ca(OH)2 is 74.1 g/mol.
What is the structure of the alkane? The reaction of lithium di-sec-butylcuprate with isopenyl bromide yields?
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