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(a) How many grams of Na2SO4 are there in 15 mL of 0.50 M Na2SO4? (b) How many milliliters of 0.50 M Na2SO4 solution are needed to provide 0.038 mol of this salt?
Suppose cot(x) = -6.5 and sin(x)<0. Find the following quantities (you can use .5 instead of a square root in a numerical answer.
The molar heat of neutralization from hydrochloric acid and sodium hydroxide is -57.3 kJ/mol. use this accepted value to predict the heat evolved during the neutralization of 655 ml of 1.00 M hydro
At 400 K, the rate of decomposition of a gaseous compound initially at a pressure of 12.6 kPa, was 9.71 Pa/s when 10.0 % had reacted and 7.67 Pa/s when 20.0 % had reacted. Determine the order of rea
Write the function in terms of the cofunction of a complementary angle. Csc(5pi/12)
Find all solutions to the following equation on the interval [0,2pi)
Is anyone willing to write out the steps and explain them to me? My test is on Thursday and I'm still having trouble with these problems.
The terminal side of ? lies on a given line in the specified quadrant. Find the values of the six trigonometric functions of ? by finding a point on the line.
A 1.71 mol sample of Ar gas is confined in a 41.9 liter container at 25.7 C. If the volume of the gas sample is decreased to 15.3 L holding the temp constant, the average molecular speed will increa
Question: Xenon gas is released during a certain chemical reaction and pushes back the atmosphere with a change in volume of the vessel (it has a movable piston) from 2 to 20 Liters. Calculate the w
Use the funamental identities and simplify each expression to get a numerical value. Please show all steps that you use to solve.
Find the vertex of the parabola defined by the function y=4x^2+2x-3 by completing the square.
You have worked with various functions now. How can you tell if a function is even or odd? Graphically, what does an even function do? Graphically, what does an odd function do?
The density of solutions are assumed to be the same as water. If the density of all 3 solutions was actually 1.1 g/mL, how would the heat of the reaction be affected?
Two planes take off at the same time from an airport. The first plane is flying at 244 miles per hour on a course of 130.0 degrees. The second plane is flying in the direction 165.0 degrees at 356 m
The balloon rises to an altitude of 20,000 m where atmospheric pressure is 65 mmhg and the temperautre is 210k. What is the volume of the balloon at 20,000m?
In January 2000 you began a one-year study of tuberculosis (TB) in a subsidized housing community in the Lower East Side of New York City. What was the cumulative incidence of TB over the year?
A weather radar system scans a circular area of radius 45km. The beam rotates 6 complete revolutions in one minute. How much area (in square km) is swept through in 3 seconds.
Directions: write an equation of the conic section. Parabola with vertex at (5,3) and directrix y=6.
Write a balanced equation for the decomposition reaction described, using the smallest possible integer coefficients.
Question: Hydrogen peroxide H2O2 decomposes according to the equation: H2O2(liquid) = H2O (liquid) + 1/2O2 (g) From the following data, calculate the value of delta G for this reaction at 25 degrees C
The sum of the circumference and height of a cylinder is 20cm. What is the surface area of the cylinder?
A system at equilibrium or striving to reach equilibrium responds in a way that best accommodates or reduces any stress placed upon it. What is this known as in chemistry?
A blobsled starts from rest and slides down a frictionless 7.5 deree slope. What's its final speed after 25 seconds?
Find the value of tan (a-B) if cos a = -3/5, and B = 5/13, 90degrees < a < 180degrees, and 90degrees < B < 180degrees?