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Sorbic acid, C5H7COOH, is a weak monoprotic acid with Ka = 1.7 x 10-5. Calculate the pH of a solution containing 11.25 g of potassium sorbate in 1.75 L of solution.
what advice would you give a company regarding environmental condition that would maximize the percentage yield of ammonia?
A chair of weight 125 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 45.0 N directed at an angle of 38.0^circ below the horizontal and the
Regarding resonance structures of diazomethane, H2CN2, why wouldn't the following flow of electrons be valid: Starting with 2 double bonds between H2C=N1=N2 with N1 with a f.c. of +1 and N2 with 2
She concludes that the unknown element must belong in group 2 of the periodic table. State whether or not you think this result supports her conclusion, and why.
What is the solubility in moles/liter for copper(II) iodate at 25 oC given a Ksp value of 1.4 x 10-7. Write using scientific notation and use 1 or 2 decimal places (even though this is strictly inc
A ball of mass 3 kg is thrown straight up in the earth's gravitational field with an initial speed v0 = 19 m/s. What is the speed of the ball at a height h = 1.9 m?
Freeze the water overnight. Look at the height of the ice compared to the line you drew the day before. What property of water do you observe?
What mass of natural gas CH4 must you burn to emit 272 kJ of heat?
Three equal point charges, each with charge 1.90 , are placed at the vertices of an equilateral triangle whose sides are of length 0.400 . What is the electric potential energy of the system? (Take
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2 and 12.0 g of He at 14°C is in a 50.0-L container. What is the total pressure in the vessel?
The contents of one 80. lb bag of topsoil will cover 30. square feet of ground to a depth of 1.7 in. What number of bags are needed to cover a plot that measures 600. by 700. m to a depth of 1.5 cm
A 38.0 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in this position is 5.20 105 N·m2/C. What is the magnitude of the
What is the theoretical yield of aluminum oxide if 2.40 of aluminum metal is exposed to 2.10 of oxygen?
An electric motor rotating a workshop grinding wheel at a rate of 99 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.30 rad/s2. (a) How long doe
Write a balanced net equation for the reaction between aqueous solutions of HClO4 and NaH2PO4. Write a balanced net equation for the reaction between aqueous solutions of HBr and NH3.
A short time later when the student returns, the temperature has risen to 97.5 °C. The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) h
After the block is released from rest it travels upward and then leaves the spring. To what maximum height above the point of release does it rise?
Calculate the theoretical yield of rm C_2H_5Cl when 119 g of rm C_2H_6 reacts with 250 g of rm Cl_2, assuming that rm C_2H_6 and rm Cl_2 react only to form rm C_2H_5Cl and rm HCl.
The second car starts from rest and has a constant acceleration. What acceleration must it maintain, so that the two cars meet for the first time at the next exit, which is 1.69 km away?
Draw the lewis structure for C2H2 and C2H4 include all lone pair electrons
What is the average time-integrated Sm/Nd ratio of a magma source whose present 143Nd/144Nd ratio is 0.51300? Assume that t = 4.60 × 109y and that the initial 143Nd/144Nd ratio of the magma s
Neglecting all resistive forces, determine the spring constant.Neglecting all resistive forces, determine the speed of the projectile as it moves through the equilibrium position of the spring (whe
What is the pH of the solution resulting from the addition of 40.0 mL of 0.200 M HClO4 to 20.0 mL of 0.150 M NaOH?
Assuming that the collision factor remains the same, by how much must an enzyme lower the activation energy of the reaction in order to achieve a 3×105-fold increase in the reaction rate?