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When 40.0g of ammonia and 50.0 g of oxygen are mixed and allowed to react, which is the limiting reagant? 4NH3 +5O2--> 4NO + 6H2O
A block A of mass 2kg rests on another block B of mass 8 kg which rests on a horizontal floor. The coefficient of friction between A and B is 0.2 while that between floor and block B is 0.5 When a h
What is the probability of a random dart landing inside the bullseye?
Determine how you would make a 100ppb solution of riboflavin from a 50mg/L stock solution. Do the same for preparation of a 500ppb solution from a 50mg/L stock solution.
A body of mass 60 kg is dragged with just enough force to start moving on a rough surface with coefficients of static and kinetic friction 0.5 and 0.4 respectively. On applying the same force what i
Nutritional tables give the potassium content of a standard apple as 159 mg. There are about 3 apples/lb. How many grams of potassium are in 45.75 kg of apples?
Thomas used equimolar amounts of diethylamine and alpha chloro-2,6-dimethylacetanilide in the preparation of Lidocaine. All the starting material reacted but failed to isolate any Lidocaine. Why?
Parqueting by an object is covering a plane by copies of the same object. Can you parquet the plane by an equilateral triangle and which regular n-gons is it possible to parquet the plane?
It is valuable to know that 1 milliliter (mL) equals 1 cubic centimeter (cm^3 or cc). How many cubic centimeters are in an 8.00 oz bottle of cough medicine?
A Square and a rectangle have the same area of 36cm2. What is thelength of the side of the square? If the rectangle has a lengthwhich is 3 cm more than the side of the square,find the length.Find th
A solution is prepared by dissolving 2.86 grams of sodium chloride, 3.9 grams of ammonium sulfate, and 0.896 grams of potassium iodide in 246 grams of water. Calculate the total mass of the soluti
The same sequence is found on both strnads, but running in opposite directions. what word describes this characteristic?
The coordinates of (x,y) of each point on thecircle above satisfy the x2 + y2 = 25. Line l is tangent to the circle at a point A. If the x coordinate of point Ais -4, what is the slope of line l? the
After heating, the remaining solid weighed 0.432 g. Assuming all the CaCO3 broke down to CaO and CO2, calculate the mass percent of CaCO3 in the original mixture.
Imagine a transversal intersecting two parallel lines. If the slope of the transversal is changed to increase one of the angles at the intersection by, what happens to the adjacent angle?
Lidocaine is used as a drug during heart attacks to correct irregular heart rhythms called pvcs. The normal dosage is 1.5mg/kg/hour. How much lidocaine would a 264 lb man receive in 218 minutes?
A square support unit in a television is made with a sidemeasuring 4 centimeters. A new model being designed for the upcoming year will have a larger square with a side measuring 4.3centimeters. By
Calculate the actual van't hoft factor for this mixture. About how much of the HNO2 is dissociated and explain how you know this, based on the calculated value of i.
Let A, B, and C be three noncollinear points and let P be a point in the interior of angle BAC. Then P lies on the angle bisector of angle BAC if and only if d(P, AB) = d (P, AC)
An embroidered placement costs $2.95. An embroidered table cloth is similar to the placemat, but four times as long andfour times as wide. How much would you expect to pay for the tablecloth?
What are the two types of errors one encounters in experiments? Give an example of each. You may use examples from your chemistry, biology, or other physics courses.
How many grams of the tablet should be used to provide 75.0 mg of CaCO3? How many mg Ca are contained in the partial tablet?
A 0.5118 g sample of CaCO3 is dissolved in 6 M HCl, and the resulting solution is diluted to 250.0 ml in a volumetric flask. What is the molarity of the Ca2+ ion in the 250 ml of solution?
How many minutes does it take for a radio message to reach earth from Saturn if Saturn is 7.9X10^8 km from earth?
If you know two triangles are similar by the SAS Similarity Theorem what, additional piece(s) of information would you need to prove this triangles congruent? Please explain why.