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A merry-go-round rotates at the rate of 0.26 rad/s with a(n) 42.6 kg man standing at a point 2.4 m from the axis of rotation. What is the new angular speed when the man walks to a point 1.4 m from the center? Assume that the merry-go-round is a solid 8.82×102 kg cylinder with a radius of 3.30 m. Answer in units of rad/s.
Because of increasing evidence of damage to ozone layer,CFC production was banned in 1996.However, there are 100 million auto air conditioners that still use CFC-12(CF2C12) These air conditioners are recharged from stockpiled supplies of CFC-12.
In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed.
Explain why recrystallization, as a general technique, is usually effective at removing a few percent of impurity, even though the solubility (g/mL) of the impurity might be similar to that of the main component.
When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide via the reaction:CaCO3(s)----> CaO(s) + CO2(g)
Write a balanced equation for the reaction of Al(H2O)6^3+ in aqueous KF. Include physical states for each reactant and product
At a certain temperature, Keq = 150. Calculate the concentrations of Fe 3+ and SCN- in a solution that has an equilibrium FeSCN2+ concentration of 4.5 X 10^-5 M using the equation . Assume the equilibrium concentrations of Fe3+ and SCN- are equal.
What is the pH of the solution at the equivalence point for the titration of 100 mL of a .786 M HCO2H solution with a .786 M Solution of sodium Hydroxide? Formic acid has a Ka=1.80*10^-4
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range.
consider the following reaction: 2 A(g) + B(g) 3 C(g) + D(g) Please determine Kc if 6.0 moles of A is added to 6.0 moles of B in a 2.0 L yields 0.10 moles of D at equilibrium.
a gas mixture with a total pressure of 745 mmHg contains each of the following gases at the indicated partial pressures: CO2, 265 mmHg; Ar, 121 mmHg; and )2, 168 mmHg. The mixture also contains helium gas. what is the partial pressure of the heliu..
State how C and D will decompose or reductively eliminate
A 25 ml of sample of 0.150M benzoic acid is titrated with 0.150M NaOH solution. Explain what is the pH at the equivalence point?
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