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Magnesium hydroxide is used in several antacid formulations. When it is added to water it dissociates into magnesium and hydroxide ions.
Calculate the hydronium ion concentration and the pH after the addition of 0.25 mL of 0.10 M HCl to each one. Ka of acetic acid = 1.8 x 10-5 Acetic acid/sodium acetate buffer Acetic acid .1M Sodium
An object with mass m1=%.00kg rests on a frictionless horizontal table and is connected to a table that passes over a pulley and is then fastened to a hanging object with mass m2=10.0kg. Find the ac
Deduce the rate law and rate constant of the reaction from the given experimental data (Hint: calculate the change in concentration of the reactants to at least three decimal places).
The volatile liquid ethyl mercaptan C2H6S is one of the most odoriferous substances known. It can be added to natural gas to make leaks detectable. How many molecules of ethyl mercaptan C2H6S are co
This situation is like that of a car on a curve that is banked at an angle of 22°. If she tries to make the turn without slowing down, what is the minimum distance from the sea wall that she can
A baseball (m = 151 g) approaches a bat horizontally at a speed of 43.1 m/s (96.4 mi/h) and is hit straight back at a speed of 51.7 m/s (116 mi/h). If the ball is in contact with the bat for a time
Consider the reaction CuSO4(s) ! CuO(s) + SO3(g) . If G? = -14.6 kJ at 950?C for this reaction, calculate ΔG for an SO3(g) pressure of 50 bar at this temperature.
Metal X was plated from a solution containing cations of X. The passage of 48.25 C deposited 31 mg of X on the cathode. What is the mass of X (in grams) per mole of electrons?
If a sample containing 1.50mL of nitroglycerin (density=1.592g/mL) is detonated, how many total moles of gas are produced?
How much work is done in kilojoules for the reaction of 6.40 of acetylene at atmospheric pressure if the volume change is -2.76 ? & ;
A uniform plank of length 4.3 m and weight 215 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who we
Which would work better for the purpose, magnesium or zinc? Explain your answer based on the oxidation potentials for each metal.
If 76.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
How much heat is required to vaporize 25.5 g of water at 100 C? The heat of vaporization of water at 100 C is 40.7 rm kJ/mole.
how many moles of urea (60.0 g/mol) must be dissolved in 100.00 g of water to give a 2.5 molal solution.
The total work done by the tension is zero for one out over the water. If the rope starts at an angle of 40.0 with revolution. The vertical, what is Bruces speed at the bottom of the swing?
Methane has a heat of fusion of 0.84 kJ/mol and a heat of vaporization of 9.2 kJ/mol. Estimate the value for the heat of sublimation.
Calculate pH and pOH of .050 m solutions of H2CO3 and Al(h20)63+
Show the movements of the electron pair that occur to form the product. Which reactant is the lewis acid? Which is the Lewis base? how do you know?
Water flows over Victoria Falls, which is 128 m high, at a rate of 1.4 x 106 kg/s. If half the potential energy of this water were converted into electric energy, how much electric power would be p
A 84.0mL volume of 0.25 M HBr is titrated with 0.50 M KOH. Calculate the pH after addition of 42.0mL of KOH.
A 47.6-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk ma
Write the half-reactions for the following redox reaction 2Li + H2 -> 2LiH
75.00 mL of an aqueous solution of formic acid is titrated with a 0.150 M aqueous solution of NaOH. It is found that 21.25 mL of the NaOH solution is needed to reach the equivalence point. Formic ac