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Why is soap not suitable for laundry use with hard water,whereas, the synthetic detergent is? What is the chemicaql composition of peanut oil?
Each glass of 2% milk contains 9 g of protein, 13 g of carbohydrates, and 300 mg of calcium. How many servings of each food should the dietician provide for the patient?
The concentration of a chemical degrades in water according tofirst-order kinetics. The degradation constant is 0.2/day. If theinitial concentration is 100 mg/L, how many days are required for the
The width of a slit is 2.00 x 10-5 m. Light with a wavelength of 485 nm passes through this slit and falls on a screen that is located 0.55 m away. In the diffraction pattern, find the width of the
A current of 250 A flows for 24 hours at an anode where [Mn]2+ (aq)is being converted to MnO2 (s). What mass of MnO2 is deposited at this anode?
You can afford to put $1,500 per quarter into the fund, and you will work for 40 years before retiring. After you retire, you will be paid a quarterly pension based on a 25-year payout. How much wil
The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year-1. What fraction of the tritiuminitially in a sample is still present 30 years later?
What is the pressure at the bottom of the container? Assume 1000 kg/m3 and 901 kg/m3 for the density of water and the oil, respectively.
For how long (to the nearest year) should you lease the car so that your monthly payments are lower than if you were purchasing it with an 7%-per-year loan? You should lease the car for how many yea
What is the "exact" alkalinity of water ( in mg/L asCaCO3 ) that contains 0.6580 mg/L of bicarbonate, as theion, at a pH of 5.66?
If the masses are moved 5 times as far apart, what is their new mutual force of gravitational attraction?
Why is the separation of mixtures into pure or relatively pure substances so important when performing a chemical analysis?
If you are being charged 15% interest per year, how long (to the nearest 0.5 years) will it take you to repay your debt?
The minimum energy necessary is 0.7 eV. What is the maximum wavelength beyond which this film will not record light? In what region of the spectrum does this light fall?
Calculate the mass of KI in grams required to prepare 5.00x 102 mL of a 2.80 M solution. How would you prepare 60.0 mL of 0.200 M HNO3from a stock solution of 4.00 M HNO3?
A buyer orders 3 Dogs houses and 2 Windows, 1 Side panel, and 2 Windows as spare parts. How many of each part are required to fill the order?
A parallel-plate capacitor is formed from two 1.0 cm times 1.0 cm electrodes spaced 2.9 mm apart. The electric field strength inside the capacitor is 1.0 times10^{6} N/C. What is the charge (in nC)
At what price is the elasticity of demand unitary (unit)? If the price increases by 3% from $100 per wigit, what is the approximate percentage change in demand?
A small but measurable current of 1.4 10-10A exists in a copper wire whose diameter is 1.9 mm. Assume the current is uniform. (a) Calculate the current density. (b) Calculate the electron drift speed.
An 10.0 m, 300 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. How
Assuming that Calculus and You currently sells 5,000 copies per year and that sales will continue this pattern of decline, calculate total future sales of the text.
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3.20 m long. What is the tension in each rope when the 690 N worker stands 2.20 m
Consider an electrochemical cell constructed from the followinghalf cells, linked by an external circuit and by a KCl salt bridge.1. an Al(s) electrode in 1.0 M Al(NO3)3solution 2. an Pb(s) electrod
Complete the square to determine whether the equation represents an ellipse, a parabola, a hyperbola, or a degenerate conic.
The object is attached to the rope at a horizontal position halfway between the two poles and at a vertical distance s = 1.092m below the top of the left pole. Find the tension in each part of the r