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approximately how many grams of NH4Cl will dissolve in 100g of H2O at 70 C?
Explain why the C=C stretching mode gives rise to a rather weak IR band in 1-methylcyclohexane, while in its isomer
The reported values for one compound (CaHbOc) were as follows: mass: 214.1360 g/mol; percent C and H: 84.07 and 8.47, respectively. Determine the molecular formula of the compound.
Energy of visible photos and breaking of the bond in AgI, The silver iodine bond energy is approx 255kJ/mol. (AgI is one of the active components in photograpgy sunglasses.)
If a raindrop weighs 53 mg on average and 5.1 105 raindrops fall on a lawn every minute, what mass (in kg) of rain falls on the lawn in 3.0 h.
what volume of 0.366M Ni(NO3)2 is required to completely react with 55.8 ml of 0.500M Na2CO3.
The total volume of hydrogen needed to fill the Hindenberg was 2.0x10^8 L at 1.00 atm and 25 C. How many kilojoules of energy were evolved when it burned?
Given the following data H Cl bond enthalpy = +431 kJ/mol, ?Hf HCl(g) = -92.31 kJ/mol
A solution is prepared by dissolving 55.1 g of KCl in approximately 75 mL of water and then adding water to a final volume of 125 mL. What is the molarity of KCl(aq) in this solution?
Determine the final pressure, volume, temperature, and number of moles of gas when the volume is reduced by half at the time when gas is compressed? Use C p /C v = 1.3
When 228.4 mg of pure X was burned 627.4 mg of CO2 and 171.2 mg of H2O were obtained. Determine the simplest formula of the compound X.
1.0 mol of CaCN2 and 1.0 mole of water are mixed together: CaCN2 + 3H2O → CaCO3 + 2NH3 How much NH3 could be produced?
Ethylene gycol has a density of 1.11g/mL. What is the volume of 30.0 g of ethylene glycol?
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