Matthew and bradley got into an argument. matthew was convinced that the above picture was rna, and bradley was positive that it was dna. who is right and why? a) both matthew and bradley were wrong as this is not dna or rna. b) there is not enough information in the picture to conclude who was right. c) matthew was right because rna is single-stranded while dna is double-stranded. d) bradley was right because dna is single-stranded while rna is double-stranded.

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.