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Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. Catalysts increase reaction rates. Solid catalysts do not affect reaction rates. A balanced chemical reaction is necessary to relate the rate of disappearance of a reactant to the rate of appearance of a product. Reaction rates can show little change as masses of solid reactants increase. The rate of a reaction is independent of temperature. Catalysts decrease reaction rates
Methane reacts with oxygen to form carbon dioxide and water as shown:. determine how much methane must have reacted If 72 grams of water is formed,?
A compound of molecular weight 280 g/mol a concentration of 15.0 micrograms per ml absorbs 65 percent of radiation at a certain wavelength in a 2 cm cell.
Draw structures corresponding to each of the given names. Draw: 2-fluoro-3-methylpentane, 3-cyclobutylpentane
A polarization potential arises from a concentration difference between ions in the neighborhood of the electrode and those in the bulk of the electrolyte solution. Calculate the polarization potential in a copper electro-refining cell given the f..
What mass of ethanol, CH3CH2OH, should be dissolved in 450. g of water to obtain a freezing point of 4.5°C?
What are the atomic orbitals used in the double part of the double bond If the C-C axis of the given molecule is the y axis, and the x axis is up and down in the plane of the paper,?
Water is added to 25.0 mL of a 0.776 M KNO3 solution until the volume of the solution is exactly 500 mL. What is the concentration of the final solution.
A student dissolves 1.50g of copper(II) nitrate in water. After adding aqueous sodium carbonate solution which contains 1.80g of sodium carbonate, the student obtains 0.875g of CuCO3 precipitate.
Calculate the equilibrium constant for the reaction - flask at a certain temperature according to the reaction
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
What will be the new freezing point of a solution made from 30.0g of a nonelectrolyte solute and 400g of water? ( the molar mass of the solute is 72.0g)
Titration of 15mL of 0.125M unknown base with 0.103M HCl required 18.2mL to reach the equivalence point. the pH at the equivalence point was 2.74.
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