Most popular questions and responses by Aanu
  1. Chemistry

    A carbohydrate P contains 40% carbon,6.67% hydrogen.If P has a relative molecular mass of 60.Determine it; 1)Empirical formula 2)molecular formula [H=1,C=12,O=16]

    asked on January 23, 2016
  2. thermal energy

    1a. what is the rate of energy loss in wattm^-2 through a glass window 3.00mm thick if the outside temp is -20^0c and inside temp is 25^0c. b.) A storm window having the same thickness of glass is installed parallel to the first window with an air gap of

    asked on November 24, 2010
  3. Chemistry

    PLS solve this: Find the amount of mol of lead in 2.5g of lead(2)trioxonitrate(5)

    asked on September 23, 2009
  4. Chemistry

    PLS solve this: Find the amount of mol of lead in 2.5g of lead(2)trioxonitrate(5)

    asked on September 23, 2009
  1. Physics

    since the temp is constant use p1v1=p2v2

    posted on August 14, 2011
  2. math

    LET ASSUME IS %loss : 445-x/445=100-25/100 445-x=0.75*445 445-x=333.75 x=445-333.75 x=111.25 so u are correct

    posted on November 28, 2010
  3. chemistry

    Yes the 150f is confusing. Pls throw more light on it

    posted on October 31, 2010
  4. Physics

    For the first one use h=ut;625=95*t;t=625/95 t=6.5789s

    posted on October 28, 2010
  5. Chemistry

    The motion is restricted in solid becos of the high intermolecular forces,liquid has more motion becos the forces is lower and highest in gas becos it has no intermolecular force

    posted on October 28, 2010
  6. Organic Chemistry 2

    The double bound will come first follow by the one that have the chlorine atom at the last hydrogen atom follow by the middle one i.e. 1 3 2

    posted on June 9, 2010
  7. Geometry HELP

    Option d is correct because 2y=-x+5 divide by 2 y=-x/2+5/2 compare by y=mx+c m=-1/2 and c=5/2

    posted on June 9, 2010
  8. college physics

    do it this way M(x)=3M(100-x) x=300-3x 4x=300 x=75cm or 0.75m

    posted on June 6, 2010
  9. chem

    i think this question is correct. we cant calculate the volume. since we it is not in s.t.p.

    posted on May 10, 2010
  10. Chemistry

    just use heat gain by ice =heat lost by water.

    posted on April 21, 2010
  11. Chemistry

    try this heat=heat capacity * temperature change. just apply this formula heat evolve will be the heat. heat capacity is that of the calorimeter and temperature change is the unknown. use it

    posted on April 5, 2010
  12. Chemistry

    sodium atom doesnt contain any ion but sodium ion ionize by electron loss so as to obtain the electronic configuration of noble gases. sodium ion is much stable than sodium atom because it doesnt contain any free ion to go into reaction. sodium ion react

    posted on March 30, 2010
  13. chemistry

    it is already down fall here i promise first thing tomorrow morning but first write the equation for the reaction from there you will calculate the concentration for the product form.

    posted on March 29, 2010
  14. 9th grade chemistry

    you don't even need any equation to do this if you know the mass, the no of moles can be calculated from there i.e. no of moles=mass of sub/molar mass from there if the volume is given so you will be able to calculate the solubility which is equals to

    posted on March 29, 2010
  15. Chemistry

    you first have to know the number of moles of hydrogen present in oxalic acid from there progress it is not the same with my country ones so you can just try my formula if it works ph=-(log{h}^+) make sure log is in base ten.

    posted on March 29, 2010
  16. 9th grade chemistry

    first find the solubity but i just have an idea. in my country the provide the temp. we just find the solubility and the product

    posted on March 29, 2010
  17. chemistry

    that is true and remember that litre is equivalent to dm^3.

    posted on March 29, 2010
  18. Chemistry

    this is the combustion of hydrocarbons now to balance it use this formula CxHy+[x+y/4O2->xCO2+y/2H2O the physical state of first one is liquid the second is gas. third one is gas and last one is liquid

    posted on March 22, 2010
  19. physics

    you tried but compare the equation with y=asin(2pieft-2piex/Λ) f-frequency t-time Λ-wavelength by comparing you will solve it easily

    posted on March 22, 2010
  20. physics

    mass=density*volume volume=5*1*5=25m3 density=1000kg/m3 mass=1000*25=25000kg

    posted on March 21, 2010
  21. Physics

    that is simple. energy is never lost so energy lost by microwave=energy gain by ice cube 32200=105t t=306.6667secs

    posted on March 16, 2010
  22. Physics

    i think it is chemical to mechanical. feel this when the battery is dying the chemical energy is converted to mechanical which help the watch to move

    posted on March 16, 2010
  23. Chemistry

    add maganese seven oxide to a freshly prepared iron two. warm the mixture together and the purple colour of maganese will change to colourless that confirms iron two. the test is also for reducing agent. so peace out. i hope you get that

    posted on March 16, 2010
  24. Chemistry

    that is correct

    posted on March 13, 2010
  25. chemistry

    yes that is true. think of decomposition of KCLO3 to give kcl and o2

    posted on March 13, 2010
  26. chemistry

    formula: heat=mass of water*shc of water*change in temp. h=25*4.2*15 h=1575joules

    posted on March 11, 2010
  27. Chemistry

    you will detect if it is a solution because it will not scatter light and you can see through it if the mixture is colloidal you cant see through it and it will scatter beam of light. lastly if it is suspension it will for two layers on standing .

    posted on March 11, 2010