# Aanu

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]

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

3. ## Chemistry

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

4. ## Chemistry

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

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

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

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