It has been suggested that the surface melting of ice plays a role in enabling speed skaters to achieve peak performance. carry out the following calculation to test this hypothesis. at 1 atm pressure, ice melts at 273.15 k, δhfus=6010j⋅mol−1, the density of ice is 920. kg⋅m−3, and the density of liquid water is 997 kg⋅m−3.
part a: what pressure is required to lower the melting temperature by 4.7 degrees celsius? part b: assume that the width of the skate in contact with the ice has been reduced by sharpening to 0.019 cm, and that the length of the contact area is 18 cm. if a skater of mass 79kg is balanced on one skate, what pressure is exerted at the interface of the skate and the ice? part c: what is the melting point of ice under this pressure?
hiii, i go to lss 're taking the same class i guess. i didnt finish my test yet so i'm looking for the can u plss? (it's funny how i'm supposed to be answering the we have world cultures together too and you replied to my discussion on genetic engineering (i'm eva). so anyway i hope u reply and i want you to know that i'm also a big fan of the movies your in! byeee
although molarity is commonly used to express concentrations for reactions in solution or for titrations, it does have one drawback—molarity is the number of moles of solute divided by the volume of the solution, and the volume of a solution depends on its density, which is a function of temperature.
depending on the type of food it is either called oxidation or lipid peroxidation. hope this
the acids react with base and the reaction is known as neutralization
one mole of hydronium ion reacts with one mole of hydroxide ion
a) hi is a monoprotic acid : one mole of hi will give one mole of hydronium ion
b) csoh is a monohydroxide base : one mole of csoh will give one mole of hydroxide ion
so one mole of hi will react with one mole of csoh
the moles of csoh taken will be calculated from molarity and volume as
thus moles of csoh are
moles of hi required is 0.005425 mol
volume of hi required will be
volume of hi required is 9.86 ml