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A saturated solution of manganese (II) hydroxide is one in which the following equilibrium occurs: Mn(OH)2(s) ? Mn 2+(aq) + 2OH-(aq) Kc = 1.6 E-13. Find out the pH of this saturat
A 1 m3 sample of air was found to contain 80 micro grams per m3 of sulfur dioxide. The temperature was 25oC and the pressures were 103.193 k Pa when the air sample was in use. Determine th
According to the First-order kinetics the concentration of a chemical degrades in water and the degradation constant is 0.2/day. If the initial concentration is 100 mg/L, Determine the number of da
Determine point in second quadrant at which graph of quadratic function f(x) = 3x^2-3 intersects graph of linear function g(x) = 15 x + 39.
The community bird-watching society makes and sells simple bird feeders to increase money for conservation activities. What price must society charge for every feeder to maximize profits
The skateboarder free-fell 28 ft onto the ramp. Find skateboarder's velocity at moment he touched down onto ramp. Skateboarder's velocity is approximately ft/sec.
Assume p(x)=x^2+7x+9 and q(x)=9x^3-3x+10. Write indicated expression as the polynomial. (8p+9q)(x). Compute all real numbers x such that x^4-6x^2-16=0
Annual yield per walnut tree is fairly constant at 50 pounds per tree when number of trees per acre is 30 or fewer. Write total yield for the acre T, in pounds as the function of number of walnut tree
Ball is tossed straight up from edge of the 47 foot high building, with the initial upward velocity of 20 feet/second. Its height in feet after t seconds is. Find out how long before it reaches its
In the college meal plan you pay the membership fee, then all of the meals are at the fixed price per week. Write the formula for cost of meal plan, C , in terms of number of meals, n .
The new homeowner requires to put up the fence to make his yard secure. Area of yard is 4000 sq ft. He has enough material for160 ft of fence. Determine length and width of yard.
From the point 1500 feet closer to mountain along plain, they discover that angle of elevation is 33 degrees. Find out how high is mountain in feet?
Determine reference angle of -3/10 radians in radians? Angles of depression are found to be 26 degrees and 28 degrees. How high (in feet) is ballon?
Express the equation in terms of x which finds out how much water must be added to x liters of the 18% acid solution to decrease concentration to 15%?
The car travels for the total of 10 hours. Car averages 60 miles per hour for x hours and averages 70 miles per hour for rest of time. Write total distance traveled by car in terms of x.
If every exam is worth 20% of overall score, and final exam is worth 40% of overall score, write the expression for student's overall score if student gets the score of x on final exam.
If both copiers are utilized, they can complete activity in 72 minutes. How long it takes every machine to finish task when working alone?
Ship A leaves the port sailing east at 15 miles per hour. Two hours later, ship B leaves port sailing south at 20 miles per hour. Write distance D between ships in terms of t , where t is number of
Equation of a line which goes through point ( 6 ,6 ) and is perpendicular to line 2 x + 3 y = 3 can be written in form y = mx+b
If possible express the following equation in the slope-intercept form. 7 x - 19 y + 4 = 0. Compute value of m when written in slope-intercept form? If equation can't be written in slope-intercept for
Determine slope of through (-4, 5) and (-2,-8)? If slope is undefined, write undefined. Determine slope of line through (2, 9) and (2,10)? If slope is undefined, write undefined.
A flask contains 49.8 mL of 0.150 M calcium hydroxide. Determine the number of millimeters of 0.350 M sodium carbonate is needed to react totally with the calcium hydroxide?
Find selling price PV, per $1,000 maturity value, of bond. Meg's pension plan is the annuity with the guaranteed return of 6% per year (compounded quarterly).
A chemist wants to arrange 0.25 M HCl. Commercial HCl is 12.4 M. Determine the number of millimeters of the commercial acid does the chemist need to make up 1.50 L of the dilute acid?
Determine the minimum voltage needed for the electrolysis of 1.0M NaCl in neutral solution. 2H2O + Cl- (1.0M)---> H2(1atm) + Cl2(1atm) +2OH- (1 x 10-7M)