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A sodium hydroxide solution is prepared by dissolving 4.0 g NaOH in 5.00 L of solution. What is the molar concentration of OH- in this solution? What are the pOH and the pH of the solution? What is the hydrogen ion concentration in this solution?
a mixture of Feo and Fe3O4 when heated in air to constant weight , gains 5 % in its weight . find out composition of mixture.
What mass of aluminum metal can be produced per hour in the electrolysis of a molten aluminum salt by a current of 21 A?
The reaction x = Y is first -order overall and first-order with respect to the reactant x. The result of doubling the initial concentration of X will be to
Draw the product that is formed when 1-pentyne is treated with an excess of hydrogen gas and a nickel catalyst
soultion containing 10e-3 mol of dissolved Ag+ demonestrate that AgCl precipitate from the solution and calculate the wight og AgCl in grams that form per liter. Assume that all activities coefficients are equal to one.
A gas with a molar mass of 44 and a specific heat ratio 1.67 flows through a channel at supersonic speed. The temperature of the gas in the channel is 10°C.
What is the concentration for each substance at equilibrium for the following gaseous reaction if the initial concentration of ethene,
Calculate the lattice energy of RbCl using the following data: Rb(s) => Rb(g) ?H = +86 kJ/mol Rb(g) => Rb+(g) + e- ?H = +409 kJ/mol Cl2(g) => 2Cl(g) ?H = +242 kJ/mol Cl(g) + e- => Cl-(g) ?H = -355 kJ/mol Rb(s) + 1/2 Cl2(g) => RbCl(s) ?H = -435 kJ/..
have a buffer solution composed of 4.00 mol of acid and 1.75 mol of the conjugate base. If the pKa of the acid is 2.20, what is the pH of the buffer?
The Zeeman effect is observed as a splitting in the spectral lines of hydrogen in the presence of a magnetic field. What is the greatest number of lines that a single spectral line can be split into by a magnetic field? a)2 b)3 c)4 d)5 e)6
Write an Essay about Global Warming and Ocean Acidification. What is global warming and ocean acidification? Discuss the causes and consequences of global warming and ocean acidification.
A buffer solution contains acetic acid (HC2H3O2) at a concentration of 1.15 M and sodium acetate (NaC2H3O2) at a concentration of 2.05 * 10 to -2 M. The value of Ka for acetic acid is 1.75 * 10 to -5. Calculate the pH of this solution using the He..
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