Friday
October 31, 2014

Posts by Kalen


Total # Posts: 17

trig
write y=sinx-cosx in the form y=ksin (x+a), where the measure of a is in radians. answers: sqrt2sin (x+3pi/4), sqrt2sin (x+5pi/4), sqrt2sin (x+pi/4), or sqrt2sin (x+7pi/4) ...?
May 17, 2012

trig
write sin4xcos2 as the sum or difference of two functions. answers: 1/2(cos6x+cos2x), 1/2(cos2x-cos6x), 1/2(sin6x+sin2x), sin6x-sin2x
May 17, 2012

Chemistry
Consider the following chemical equation. SO2(g) + O2(g) → SO3(g) What volume of sulfur dioxide gas reacts with 37.5 L of O2? The reaction conditions are 875°C and 1.00 atm pressure.
December 5, 2010

Chemistry
Consider the following chemical equation. Cl2(g) + O2(g) → Cl2O3(g) Assuming all gases are at the same temperature and pressure, how many milliliters of oxygen gas must react to give 3.50 L of Cl2O3?
December 5, 2010

Chemistry
Consider the following chemical equation. H2(g) + I2(g) → HI(g) Assuming all gases are at the same temperature and pressure, how many milliliters of hydrogen iodide are produced from 825 mL of H2?
December 5, 2010

Chemistry
Consider the following chemical equation. MnCl2(s) + H2SO4(aq) → MnSO4(aq) + 2 HCl(g) How many grams of manganese(II) chloride must react with sulfuric acid to release 50.0 mL of hydrogen chloride at STP?
December 5, 2010

Chemistry
Consider the following chemical equation: HgO(s) → Hg(l) + O2(g) How many milliliters of oxygen gas at STP are released from the decomposition of 3.00 g of mercuric oxide?
December 5, 2010

Chemistry
Given the balanced equation, how many milliliters of oxygen gas at STP are released from the decomposition of 5.05 g of calcium chlorate?
December 5, 2010

Chemistry
if 30.0 grams of molten iron (III) oxide reacts with 275 grams of aluminum, what is the mass of the iron produced.
December 5, 2010

physics
A popular pastime is to see who can push an object closest to the edge of a table without its going off. You push the 100 g object and release it 2.90 from the table edge. Unfortunately, you push a little too hard. The object slides across, sails off the edge, falls 1.50 to ...
October 7, 2009

physics
In the total tension, what does &radic mean? Total Tension, T = &radic(T²+(mg)^2) The angle tan-1(mg/Tc) is the angle with the horizotal
October 7, 2009

physics
We are learning about circular motion, uniform and non uniform. how do you find tension in a string, when the string is attached to a object with mass m and length r? What about if you are swinging it around in a horizontal circle and the string makes a angle theata with the ...
October 7, 2009

physics
Would the force of the 4kg block acting on the 1kg block be the mass=4kg+6kg times the acceleration =50/11?
October 7, 2009

physics
Blocks with masses of 1kg , 4kg , and 6kg are lined up in a row on a frictionless table. All three are pushed forward by a 50N force applied to the 1kg block. How much force does the 4kg block exert on the 6kg block? How much force does the 4kg block exert on the 1kg block?
October 7, 2009

physics
A chandelier with mass m is attached to the ceiling of a large concert hall by two cables. Because the ceiling is covered with intricate architectural decorations the workers who hung the chandelier couldn't attach the cables to the ceiling directly above the chandelier. ...
October 6, 2009

chemistry
What is the sign of the entropy change in eaech chemical reaction? a) N2O4(g)--> 2NO2(g) b) PCl3(g) + Cl2(g) --> PCl5(g) c) 2 Al(s) + 3/2 O2(g) --> Al2O3(s) d)N2(g) + 3H2(g) --> 2 NH3(g) e) S(s) + O2(g) --> SO2(g)
April 6, 2008

chemistry
What am I doing wrong? Estimate the normal boiling point of liquid mercury Hg(l) <--> Hg(g) Hf 0.0 61.4 S 75.9 174.97 DH = 61.4 kJ DS = .09907 T = DH/DS = 619.76 - 273 = 346. 76 degrees celsius
April 6, 2008

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