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Combustion of 25.0 g of a hydrocarbon produces 85.9 g of CO2. What is the empirical formula of the compound?
CO2 properties: appearance, reaction with limewater, reaction with flame, behavior with water. If positive observation then write a balanced equation.
a 0.6407g sample containing only chloride and iodide ions gave a silver precipitate weighing 0.4430g. this precipitate
A sample of sodium reacts completely with 0.426 of chlorine, forming 702 of sodium chloride. What mass of sodium reacted?
Calculate q if the temperature of a 1.00 kg water bath in the surroundings increases by 1.25 Celsius degree.
The energy levels the electron can occupy in the Be3+ ion can be calculated using the energy level equation. Calculate the energy in J of the electron when it is in the n= 4.00 level.
A student places 2.0 moles of methylamine in 500ml of water. what is the pH? the Kb of methylamine is 4.4x10^-4.
Calculate the frequency of the light emitted when an electron in a hydrogen atom
If 200ml of 2.00M HCL solution is added to 400ml of 1.00M NaOH solution What molarity will the resulting solution NaCl have?
calculate the maximum nonexpansion work that can be gained from the combustion of benzene l and of h2 g on a per gram
Consider the reaction at 25C 2NO2 --> 2NO + O2 The overall rxn rate = k[NO2]2. The rate constant, k = 1.4 × 10^10 M-1 s-1. If 3.8 moles of NO2 are initially present in a sealed 1.00 liter vessel at 25 C, what is the half-life of the reaction
The number of protons in atoms of a given element; the number of electrons in atoms of a given element (Z)?
A mixture containing 4.33 g of CO2 and 3.11 g of CH4 has a total pressure of 1.09 atm. What is the partial pressure of CO2 in the mixture?
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