Question Solved1 Answer An analytical chemist prepared a chloride stock solution by adding 23.73 g of salt (NaCl) to 5.0 L of water. The fluorescence intensity of a 50 ml solution made from 10.00 ml of the stock and containing 0.01 mM of fluoroscein was measured to be 135 counts. The intensity of a 0.01 mM solution of fluorescein in water alone was 720 counts. The literature value for the fluorescence lifetime of fluorescein in water is 4.1 ns. Calculate the value of the dynamic quenching constant, ka, of fluoroscein V by Cl in water.4 marks

For the equilibrium reaction below, write the expression for the reaction quotient, Qc. 2SO2(g)+CO2(g)↽−−⇀CS2(g)+3O2(g)2SO2(g)+CO2(g)↽−−⇀CS2(g)+3O2(g) 𝑄cQc, which is sometimes symbolized as 𝑄Q , denotes that the reaction quotient is expressed using molar concentrations. For this question, 𝑄cQc means the same thing as 𝑄Q.

5. Justify your answers to the following with calculations. [8] a) You were driving at a speed of 75 miles per hour and you were pulled over by the police for going over the speed limit of 100 km/h. How many km/h over the speed limit were you driving? b) A T-bone steak sells for $4.99/1b at store A and for $10/kg at store B. Which price is the better buy? c) 5. Justify your answers to the following with calculations. [8] a) You were driving at a speed of 75 miles per hour and you were pulled over by the police for going over the speed limit of 100 km/h. How many km/h over the speed limit were you driving? b) A T-bone steak sells for $4.99/1b at store A and for $10/kg at store B. Which price is the better buy? c) A can of paint states that it will cover 40 m². Is one can enough to paint walls with a total area of 500 ftº? d) An advertisement states that a car's fuel consumption is 35 mpg. What is this fuel consumption in litres per 100 km?

please answer the following, thank you **Show ALL of your work. 1. Solve the following inequalities using an algebraic method. ✓✓ & ✓✓✓ a) x(x + 2)(x-2)(x + 3) ≥ 0 b) x²-2x-15 x²-16 20 for a function with a vertical asymptote at x = -2 and a kx-c 2. Determine an equation in the form f(x)=; y-intercept of✔✔ 3. Prove that sin (x+) = cos x is an identity. ✔✔

The smooth surface of the vertical cam is defined in part by the curve \( r=(0.2 \cos \theta+0.3) \mathrm{m} \) (Figure 1) If the forked rod is rotating with a constant angular velocity of \( \dot{\theta}=4 \mathrm{rad} / \mathrm{s} \), determine the force the cam and the rod exert on the 1.5-kg roller when \( \theta=30^{\circ} \). The attached spring has a The smooth surface of the vertical cam is defined in part by the curve \( r=(0.2 \cos \theta+0.3) \mathrm{m} \) (Figure 1) If the forked rod is rotating with a constant angular velocity of \( \dot{\theta}=4 \mathrm{rad} / \mathrm{s} \), determine the force the cam and the rod exert on the 1.5-kg roller when \( \theta=30^{\circ} \). The attached spring has a stiffnesss \( k=30 \mathrm{~N} / \mathrm{m} \) and an unstretched length of \( 0.1 \mathrm{~m} \). Express your answers in newtons using three significant figures separated by a comma.

4. In humans, the antibiotic Ceftriaxone has the mean values for the apparent volume of distribution 300 L and total clearance CL=14L/h and t1/2= 8 h. . Salmonella infection is susuceptible to Ceftriaxone at concntration above 5 ug/mL and patient gets overdosed at the levels above 80ug/L. Calculate an IV dose ad infusion rate that provides steady-state level of 30ug/mL in human. b)The doctor decides to give a dose of 12 mg and started a constatnt infusion at the same Ro calculated . Ceftriaxone is eliminated as unchanges in the urine and the drug concentrations were recorded as; Time (h.) Con. Ug/L 0 4 12 6 24 6.8 36 7.5 360 10 a) Compute the Vd for patient (10pts) b) Compute the CL (10pts)

4. In humans , the antibiotic Ceftriaxone has the mean values for the apparent volume of distribution 300 L and total clearance CL=14L/h and t1/2= 8 h. . Salmonella infection is susuceptible to Ceftriaxone at concntration above 5 ug/mL and patient gets overdosed at the levels above 80ug/L. Calculate an IV dose ad infusion rate that provides steady-state level of 30 ug/mL in human. b)The doctor decides to give a dose of 12 mg and started a constatnt infusion at the same R, calculated . Ceftriaxone is eliminated as unchanges in the urine and the drug concentrations were recorded as ; Time (h.) Con. Ug/L 0 4 12 6 24 6.8 36 7.5 360 10 a) Compute the Vd for patient (10pts) b) Compute the CL (10pts)