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Aanu
Questions (4)
A carbohydrate P contains 40% carbon,6.67% hydrogen.If P has a relative molecular mass of 60.Determine it; 1)Empirical formula
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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
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PLS solve this: Find the amount of mol of lead in 2.5g of lead(2)trioxonitrate(5)
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PLS solve this: Find the amount of mol of lead in 2.5g of lead(2)trioxonitrate(5)
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Answers (27)
since the temp is constant use p1v1=p2v2
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
Yes the 150f is confusing. Pls throw more light on it
For the first one use h=ut;625=95*t;t=625/95 t=6.5789s
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
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
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
do it this way M(x)=3M(100-x) x=300-3x 4x=300 x=75cm or 0.75m
i think this question is correct. we cant calculate the volume. since we it is not in s.t.p.
just use heat gain by ice =heat lost by water.
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
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
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.
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
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.
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
that is true and remember that litre is equivalent to dm^3.
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
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
mass=density*volume volume=5*1*5=25m3 density=1000kg/m3 mass=1000*25=25000kg
that is simple. energy is never lost so energy lost by microwave=energy gain by ice cube 32200=105t t=306.6667secs
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
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
that is correct
yes that is true. think of decomposition of KCLO3 to give kcl and o2
formula: heat=mass of water*shc of water*change in temp. h=25*4.2*15 h=1575joules
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 .
