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the proton has a radius of approximately 10 times 10-13 and a mass of 17 times 10-24 g determine the density of a
a new drug is being developed by an important pharmaceutical company it has been noted that the interaction in solution
briefly explain why different nuclei hydrogens in a molecule give rise to their own nmr
how much heat is exchanged when 100g of solution with a specific heat of 393 jg-1k-1nbsphas an increase in temperature
write a chemical equation that describes the heat of neutralization for the reaction of calcium hydroxide with acetic
in an experiment in a general chemistry laboratory a student collected a sample of a gas over water the volume of the
stearin also known as tristearin is a simple triglyceride formed by three chain of stearic acid its biochemical
a sample of an unknown compound was analyzed and was found to contain 0267 moles of tin and 1068 moles of chlorine what
in a system where deltae -510 kj a piston expanded against a pextnbspof 12 atm gives a change in volume of 320 l what
1 how many grams of dry nh4cl need to be added to 240 l of a 0200nbspmnbspsolution of ammonia nh3 to prepare buffer
two liters of oxygen at 25 degree celsius and a pressure of 23 atm is added to a 30 l flask containing nitrogen with a
a blood sample containing salbutamol salt hcl is analysed in the pharmaceutical laboratorya calculate the molecular
a student planned an experiment that would use 010 m propionic acid hc3h5o2 calculate the value of h and the ph for
the boiling points for h2o bp 100oc and h2s bp -60degc are drastically different despite oxygen and sulfur being next
q1a sample of an unknown compound was analyzed and was found to contain 00894 moles of silver and 00447 moles of sulfur
the main component of many phosphate fertilizers is ca h2po42h2oif a fertilizer contains 171 p by mass w w and all of
1 50 g of white phosphorus are reacted with a limited amount of molecular chlorine to produce a colorless liquid a then
1 explain why the melting point and boiling point of alkali metals are low2 why is the ionisation action of alkali
1 a 50 ml volume of hcl solution and 05 m concentration was added to a sample of 55 g of magnesia milk this solution
two protons are separated by a distance of 100 my if an electron is placed between the two protons and is 040m from one
four charges q are located at the corners of a square of sides what is the electric potential at the center of the
a 90 ohm and a 60 ohm resistor are connected in a series to a 12v battery a what is the current on the circuit b what
a 80 ohm and a 40ohm resistor are connected in parallel to a 12vbattery a what is the current in in the circuit b what
a high energy pulsed laser emits 350 nano second-long pulse of average power 170nbsptimesnbsp1011nbspw the beam is
in 1897 english physicist jj thomson discovered the electron with a very elegant and relatively simple experiment